CPU bench2.pdf

CPU Benchmark, Part 2: Mainstream

Processors

The second part of our extensive processor comparison is devoted to products that fall into the $100-$200 priceinterval. We compared the performance of nineteen CPU models from AMD Athlon II X4, AMD Phenom II X2,AMD Phenom II X4, AMD Phenom II X6, Intel Core 2 Duo, Intel Core 2 Quad, Intel Core i3 and Intel Core i5processor families.

by Ilya Gavrichenkov

11/18/2010 | 12:00 AM

If you are following our reviews, you know that as we are approaching the holiday sales season, we decided amassive comparative testing of all currently available processor might come in very handy. The first articletalking about the obtained results was posted a few days ago and discussed sub-$100 CPUs, i.e. the processorsfrom the Value market segment. And as our tests showed, despite the existing stereotypes, inexpensiveprocessors can perform at a very decent level and in most cases can become a good basis for a contemporaryplatform. A system with an inexpensive CPU inside can undoubtedly deliver sufficient performance for themajority of popular home and office applications and can even become a good entry-level gaming system.

However, if you are going to use your computer for more resource-hungry tasks, like audio and video processing,scientific calculations or image rendering in CAD systems, the computational capacity of a Value CPU may beinsufficient. Gaming fans who are following the gaming market carefully and care for high-quality 3Dexperience, should also consider buying a more expensive processor. Our second article is aimed at theseparticular users and it is going to talk about mainstream processors, which price starts at $100.

As for the maximum price in the mainstream segment, it is usually very easy to set. Both leading CPU makersbelieve that the mainstream segment currently ends at $200 and we agree with them. It is a known fact that asthe processor price increases, their price-to-performance ratio becomes considerably smaller. For example, valueprocessors offer about 1.5 times higher return on investment than mainstream CPUs priced between $100 and

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$200. As soon as you pass the $200 bar the price-to-performance ration drops dramatically, so while the priceson the tags increase rapidly, the performance improvement you get as a result of additional financial investmentturns out not as noticeable as it was before. This is exactly why the $100-$200 price range is consideredmainstream – the CPUs in this price range are selling at quite acceptable price, which is totally justified by theirperformance.

And don’t think that we cut off the mainstream price segment at a very low maximum. This is the reality: pricewars between AMD and Intel that have been going on for a few years now result in lower CPU costs. And theonly winner in this war is definitely the consumer: not only quad-core, but also six-core processors working atrather high clock speeds in contemporary platforms are currently available within the affordable $200 pricerange. Therefore, CPUs priced between $100 and $200 are currently one of the most popular choices when itcomes to building a universal home PC. And AMD as well as Intel offer so many different processor modelswithin this segment, that we will be discussing as many as nineteen CPUs within our today’s article.

Mainstream Processors from AMD

AMD experiences quite explicable difficulties with the production of high-performance processors, because theydo not have any new-generation microarchitectures available to them. That is why they do not offer that manyoptions in the mainstream segment. Moreover, AMD’s mainstream processors are based on the samemicroarchitecture as their Value products and are manufactured using the same 45 nm process. Therefore, it isnot surprising that all value and mainstream solutions from AMD are positioned for the same exact platform –Socket AM3. The peculiarity of this platform is dual-channel DDR3 SDRAM support. Moreover, all AMDprocessors can clock the memory at up to 1600 MHz frequency, even though this feature may not be highlightedby the manufacturer.

The differences between AMD products for different price segments lie primarily in the number ofcomputational cores. The company offers dual- and triple-core processors in the lower price segment, while inthe mainstream segment we see CPUs with four and six cores.

Athlon II X4. This processor family includes low-cost quad-core products. The junior model from this familymay be formally considered a value CPU, as it is priced at $100. The main drawback of Athlon II X4 processorsthat separates them from Phenom II series is the absence of L3 cache memory and a relatively small L2 cache,which is only 512 KB per core. Luckily, these processors have good clock speeds: the current models work at3.0-3.1 GHz.

Phenom II X2. This is another “border” processor family that may be placed in the mainstream as well as valuesegment. It includes dual-core CPUs that are very similar to quad-core Phenom II X4 processors in their primaryfeatures (they are even based on the same semiconductor dies with two disabled cores out of four). To be moreexact, Phenom II X2 have a 6 MB shared L3 cache in addition to 512 KB L2 cache per core. Moreover, allPhenom II X2 processors belong to the Black Edition category, which means that they can be overclocked byadjusting their clock multiplier. The nominal clock frequency of the Phenom II X2 560 CPU model that falls intothe mainstream price range is 3.3 GHz.

Phenom II X4. Quad-core processors are AMD’s primary force in the mainstream segment. These CPUs work atpretty high clock frequencies of 3.2-3.5 GHz and have an unlocked multiplier, so you can easily increase theirfrequency beyond the default rates. Phenom II X4 processors have a total of 8 MB cache memory: 6 MB ofshared L3 cache and the rest is split into equal 512-KB L2 cache portions per core. Note that since Phenom IIX4 have four pretty fast cores, they have comparatively high power consumption and heat dissipation, so youmay need to make sure that you use advanced cooling systems and that your mainboard has reinforced voltageregulator circuitry.


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Phenom II X6. One of AMD’s six-core processors, Phenom II X6 1055T, has become a mainstream CPU afterseveral recent price drops. This is a unique solution, because you won’t find any other six-core processors forless than $200. At the same time, this processor works at a decent clock speed of 2.8 GHz. However, youshouldn’t forget about Turbo Core technology that AMD added to all their six-core CPU models. As a result,Phenom II X6 1055T will automatically overclock to 3.3 GHz if only three cores or less are utilized. As for thecache-memory size, it is typical of Phenom II models in AMD’s six-core processors. Each core has a 512 KB L2cache and they all share a 6 MB L3 cache.

All in all, Socket AM3 platform in the mainstream segment looks quite appealing, even though there are not thatmany CPU modifications available at this time. However, the mainboard makers undoubtedly make up for thislimited CPU variety, as they offer a significant number of various Socket AM3 solutions that allow buildingsystems with vast functionality. For example, you can use a mainstream AMD processor to build a system withpowerful graphics including two graphics accelerators working as PCI Express x16 + x16. As a result, even witha mainstream CPU inside a Socket AM3 platform may as well become a high-performance gaming system,especially since these processors prove to be very good in games.

The future looks quite promising for Socket AM3 platform also in the long-term prospective. It won’t startstepping down before the end of next year, and until them AMD will continue to gradually increase the potentialof their Socket AM3 processors. It means that you will be able to easily upgrade the Socket AM3 platform lateron. The only problem in this case is that the processor performance will hardly be increased substantially. Thebest Socket AM3 fans could expect would be a six-core processor based on the same existing microarchitecturewith no more than 3.4 GHz clock frequency, or a quad-core CPU at 3.8 GHz.

The table below shows detailed specifications of all mainstream processors from AMD that took part in ourtoday’s test session:

Mainstream Processors from Intel

Intel offers much more processors in the mainstream segment. Besides, they do not stick to only one platform inthis price range, but at the same time offer LGA775 and LGA1156 CPUs with principally differentmicroarchitecture.

However, LGA775 platform is already regarded as some kind of vestige of the past, which is kept alive only toget rid of the existing stock. Nevertheless, LGA775 processors sell pretty well for two reasons: first, there arestill a lot of systems supporting them; and second, the mainboards for this platform are fairly cheap. There areseveral modifications of LGA775 processors in the $100-$200 price range, all using the same 45 nmsemiconductor die.

Core 2 Duo. These are dual-core processors working at 2.93-3.16 GHz with a shared L2 cache 3 or 6 MB insize. Core 2 Duo use 266 or 333 MHz system bus, so you can use memory working at 1067 or 1333 MHzfrequency. Note that the specifications of different Core 2 Duo processor models may differ dramatically.


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Therefore, the higher-end E8000 series with more advanced features costs considerably more than junior modelsfrom the E7000 lineup. However, the difference in performance is indeed noticeable, especially in applicationsworking with large amounts of data.

Core 2 Quad. Quad-core processors in LGA775 form-factor are a combination of two dual-core semiconductordies sealed inside the same processor packaging. However, Intel adds more differentiation to the family bydisabling part of their L2 cache. As a result, there are two processor groups: more affordable ones that fall intothe sub-$200 price range and more expensive ones. The part of Core 2 Quad family that we will be discussingtoday includes processors with 4 or 6 MB L2 cache. So, this cache is physically located on two dies and eachhalf of it is split between the corresponding pair of cores. The clock frequencies of the CPU models that fall intothe mainstream price range vary from 2.66 to 2.83 GHz. All Core 2 Quad models support 133 MHz bus.

Frankly speaking, we do not recommend going with the LGA775 platform if you are building a new system. Firstof all, the platform promotes obviously outdated structure, when the memory controller is inside the chipsetrather than the CPU. As a result, there may be additional delays when working with the memory subsystem andin the end it affects the overall system performance quite noticeably. Secondly, LGA775 processors are in mostcases slower than LGA1156 CPUs, which are currently very versatile. In fact, the only reason why you may beinterested in LGA775 is the availability of very inexpensive Core 2 Quad processors with four computationalcores. There are currently no direct competitors for these CPUs among LGA1156 models.

The future of the LGA775 platform doesn’t look too good either. There haven’t been any new processors in thisform-factor for quite some time now. Moreover, even the existing models may soon be taken off the price-listand will sink into oblivion. All this means that upgrading a CPU in an LGA775 system may soon becomevirtually impossible and will result into a complete replacement of the entire platform.

The relatively young LGA1156 platform seems to be much more appealing. Intel currently has severalmodifications of both: dual- as well as quad-core processors for this platform. All of them are based on Nehalemmicroarchitecture. Among the major peculiarities of this microarchitecture I would like to point out higher CPUperformance, shared L3 cache, integrated memory controller and Hyper-Threading technology support, whichpresents each physical CPU core to the system as two virtual cores. Moreover, some LGA1156 processors alsohave an integrated graphics core that can be utilized on Intel H57/H55 based mainboards.

Core i3-500. These are dual-core processors based on a 32 nm semiconductor die that also contain a secondadditional die – a graphics core. The operating system sees processors like that as quad-core, because theysupport Hyper-Threading, so that each their core can process two computational threads at the same time. Corei3 processor frequencies fall into the interval from 2.93 to 3.33 GHz. They have a 4 MB L3 cache. The memorycontroller integrated into the processor supports DDR3 SDRAM with 1067 or 1333 MHz frequency.

Core i5-600. This is another dual-core processor family that has very few differences from the Core i3 the mostimportant one being Turbo Boost technology support. The idea behind this technology implies automatic CPUoverclocking (pretty significantly) when only part of the CPU is utilized (in this case one core out of two).Besides, Core i5-600 processors support AES – a set of specific cryptographic instructions, which is disabled inCore i3. The nominal frequencies of the Core i5-600 processor family stretch from 3.2 to 3.6 GHz, however,only models working at up to 3.33 GHz clock speed fall into the mainstream segment we are talking about today.All other specifications of the Core i5-600 processors are exactly the same as those of Core i3-500: Hyper-Threading technology support, 4 MB L3 cache, integrated memory controller supporting DDR3-1067 andDDR3-1333, graphics core integrated into the same CPU packaging.

Core i5-700. This LGA1156 processor family stands a little aside, because these processors use a slightlydifferent 45 nm die with four “real” CPU cores and their price is approaching $200 maximum. According to ourcriteria, only one CPU from this family could participate in our today’s test session: a less expensive Core i5-750working at 2.66 GHz frequency. This CPU supports Turbo Boost technology, but Hyper-Threading doesn’t workin it. As a result, the operating system sees it as a quad-core processor, just like it sees Core i5-600. Core i5-700


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has an 8 MB L3 cache, and the integrated memory controller is designed to support dual-channel DDR3-1067and DDR3-1333 SDRAM. I have to say that unlike other Core i5 processor models, the 700 series CPUs do nothave an integrated graphics core.

Despite the fact that LGA1156 platform is very mainstream these days, it is not free from several issues.Although Intel offers pretty fast processors for this platform, the multi-GPU configurations built in LGA1156systems will only work as PCI Express x8 + x8. Therefore, many hardcore gamers are not very excited aboutthis platform. The second drawback of LGA1156 is relatively short anticipated life span of the platform.Although it is less than one year old, in two months Intel is going to introduce LGA1155 platform that shouldreplace LGA1156. It means that we shouldn’t expect any new LGA1156 processors to come out, and the currentmodels will soon be discontinued and vanish from the store shelves.

Let’s sum everything up in the following table listing the detailed specs of all current mainstream Intelprocessors:

Testbed Configuration and Testing Methodology

Simultaneous testing of a large number of processors is a pretty complicated task that not only takes a lot of timeand effort, but also requires access to dozens of different processor models at the same time. Therefore, mostresults databases available online are either updated over a large period of time, which causes the testbedconfiguration, drivers and applications versions to change accordingly, or have the results obtained on the sameold platform that hasn’t been updated for a while. We did our best to avoid any of these problems – all our testsare current and have been performed at the same time for all CPUs. We used only the latest hardwarecomponents with the most recent BIOS and driver versions as well as the operating system with all availableupdates.

Here is the list of hardware and software components we used for our today’s test session:

Processors:AMD Athlon II X4 640 (Propus, 4 cores, 3.0 GHz, 2 MB L2);AMD Athlon II X4 645 (Propus, 4 cores, 3.1 GHz, 2 MB L2);AMD Phenom II X2 560 (Callisto, 2 cores, 3.3 GHz, 6 MB L3);AMD Phenom II X4 955 (Deneb, 4 cores, 3.2 GHz, 6 MB L3);AMD Phenom II X4 965 (Deneb, 4 cores, 3.4 GHz, 6 MB L3);AMD Phenom II X4 970 (Deneb, 4 cores, 3.5 GHz, 6 MB L3);AMD Phenom II X6 1055T (Thuban, 6 cores, 2.8 GHz, 6 MB L3);Intel Core 2 Duo E7500 (Wolfdale, 2 cores, 2.93 GHz, 3 MB L2);Intel Core 2 Duo E7600 (Wolfdale, 2 cores, 3.06 GHz, 3 MB L2);Intel Core 2 Duo E8400 (Wolfdale, 2 cores, 3.0 GHz, 6 MB L2);Intel Core 2 Duo E8500 (Wolfdale, 2 cores, 3.16 GHz, 6 MB L2);Intel Core 2 Quad Q8400 (Yorkfield, 4 cores, 2.66 GHz, 4 MB L2);


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Intel Core 2 Quad Q9500 (Yorkfield, 4 cores, 2.83 GHz, 4 MB L2);Intel Core i3-530 (Clarkdale, 2 cores, 2.93 GHz, 4 MB L3);Intel Core i3-550 (Clarkdale, 2 cores, 3.2 GHz, 4 MB L3);Intel Core i3-560 (Clarkdale, 2 cores, 3.33 GHz, 4 MB L3);Intel Core i5-650 (Clarkdale, 2 cores, 3.2 GHz, 4 MB L3);Intel Core i5-660 (Clarkdale, 2 cores, 3.33 GHz, 4 MB L3);Intel Core i5-750 (Lynnfiled, 4 cores, 2.66 GHz, 8 MB L3).

Mainboards:ASUS Crosshair IV Formula (Socket AM3, AMD 890FX + SB850, DDR3 SDRAM);ASUS P5Q3 (LGA775, Intel P45 Express, DDR3 SDRAM)ASUS P7P55D Premium (LGA1156, Intel P55 Express);

Memory: 2 x 2 GB DDR3 SDRAM (Kingston KHX1600C8D3K2/4GX):DDR3-1067 7-7-7-21 with Core 2 Duo E7500 and Core 2 Duo E7600 CPUs;DDR3-1333 9-9-9-27 with Core 2 Duo E8400, Core 2 Duo E8500, Core 2 Quad Q8400, Core 2Quad Q9500, Core i3-530, Core i3-550, Core i3-560, Core i5-650, Core i5-660 and Core i5-750CPUs;DDR3-1600 9-9-9-27 with Athlon II X4 640, Athlon II X4 645, Phenom II X2 560, Phenom II X4955, Phenom II X4 965, Phenom II X4 970 and Phenom II X6 1055T CPUs.

Graphics card: ATI Radeon HD 5870.Hard drive: Kingston SNVP325-S2/128GB.Power supply unit: Tagan TG880-U33II (880 W).Operating system: Microsoft Windows 7 Ultimate x64.Drivers:

Intel Chipset Driver 9.1.1.1025;ATI Catalyst 10.9 Display Driver.

Performance

General Performance

To estimate the processors performance in general-purpose apps we use SYSmark 2007 test that emulates usagemodels in popular office and digital content creation and processing applications. The idea of this benchmark isvery simple: it produces a single score that characterizes average system performance.


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LGA1156 platform is an indisputable leader in this test. Dual- and quad-core Core i3 and Core i5 LGA1156processors take over the entire upper part of the diagram stressing the advantages of contemporary Intel’smicroarchitecture. By the way, note that there is very little performance difference between quad-core anddual-core Core i5 processors, which indicates how effective Hyper-Threading technology actually is, as in thiscase it successfully replaces physical cores with the virtual ones.

As far as other platforms are concerned, Socket AM3 processors from the Phenom II family outperform almostall LGA775 competitors, but at the same time cam only compete against the junior and medium-ranked Core i3CPUs. The low-cost quad-core Athlon II X4 processors appear to be the outsiders in this test, as they yield evento Core 2 Quad and Core 2 Duo solutions.

The table below contains the detailed scores from the SYSmark 2007 suite sorted according to the applicationtype:


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Gaming Performance

As you know, it is the graphics subsystem that determines the performance of the entire platform equipped withpretty high-speed processors (which certainly are the products discussed in this article) in the majority ofcontemporary games. Therefore, we do our best to make sure that the graphics card is not loaded too heavilyduring the test session: all tests are performed without antialiasing and in far not the highest screen resolutions. Inother words, obtained results allow us to analyze not that much the fps rate that can be achieved in systemsequipped with contemporary graphics accelerators, but rather how well contemporary processors can cope withgaming workload. Therefore, the results help us determine how the tested CPUs will behave in the nearestfuture, when new graphics card generations will be widely available.


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Judging by the gaming test results, we can single out Core i7-750 and the entire Phenom II X4 family. Thesequad-core processors maintain the leadership under any type of gaming load, which means that they would bethe best choice for a gaming system. The six-core Phenom II X6 1055T also looks good against the competitors’background. Its Turbo Core technology proves highly efficient, making this processor perform really fast evenwhen we do not need all its six cores at the same time. However, keeping in mind the price of this six-core CPU,we wouldn’t recommend purchasing it for a gaming system.

Taking into account the pricing, we would like to point out Athlon II X4 CPUs. Although they do not have an L3cache, they prove to be stably in the middle of the pack at all times. However, dual-core processors like Core 2Duo or Phenom II X2 won’t suit for contemporary gaming needs. As we can see from the obtained results,multi-core processors or at least dual-core CPUs with Hyper-Threading technology seem to suit better for theapplications of this type.

Archiving and Encryption

To test the processors performance during data archiving we resort to WinRAR archiving utility. Usingmaximum compression rate we archive a folder with multiple files 560 MB in total size.


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System performance in WinRAR may be affected by many things: clock frequency, number of cores, cache-memory size… However, it is very likely that it is the cache-memory that plays the ultimate role in this case. Forexample, Core i5-750 with an 8 MB L3 cache retains the leadership and is closely followed by quad- andsix-core AMD processors featuring 6 MB L3 cache.

The processor performance during encryption is measured with an integrated benchmark from a popularcryptographic utility called TrueCrypt. I have to say that it can not only effectively utilize any number ofprocessor cores, but also supports special AES instructions.


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Encryption is a process that can be well paralleled, so no wonder that the six-core Phenom II X6 1055T is thewinner here. Also, quad-core AMD processors performed very well here: they left behind all of Intel competitorsincluding Core i5-600 CPUs supporting special AES instructions.

Image Editing

We measured the performance in Adobe Photoshop using our own benchmark made from Retouch ArtistsPhotoshop Speed Test that has been creatively modified. It includes typical editing of four 10-megapixel imagesfrom a digital photo camera.


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Intel processors work faster in Adobe Photoshop. And their advantage is so dramatic that the best competitorCPU, Phenom II X4 970, loses to all Core 2 Quad and Core i5 products.

Audio and Video Transcoding

We use Apple iTunes utility to test audio transcoding speed. It translates the contents of a CD disk into AACformat. Note that the typical peculiarity of this utility is its ability to utilize only a pair of processor cores.


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Apple iTunes is another application that favors Intel processor architecture. As a result, AMD processors losethe entire thing here: even a 3.5 GHz Phenom II X4 970 can’t outperform those Intel CPUs that work at 3.0GHz.

In order to measure how fast our testing participants can transcode a video into H.264 format we used x264 HDbenchmark. It works with an original MPEG-2 video recorded in 720p resolution with 4 Mbps bitrate. I have tosay that the results of this test are of great practical value, because the x264 codec is also part of numerouspopular transcoding utilities, such as HandBrake, MeGUI, VirtualDub, etc.


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Like any other task optimized for multi-core architectures, video transcoding works best on the unique six-corePhenom II X6 1055T CPU in the mainstream segment. Moreover, x264 codec is highly efficient on processorswith K10 microarchitecture, so that even quad-core Phenom II and Athlon II processors can boast very goodperformance during video transcoding. In fact, only Intel Core i5-750 can actually compete against them in thisprice range: this processor is based on Nehalem microarchitecture and features four “real” physical cores.

The performance in Adobe Premiere Pro is determined by the time it takes to render a Blu-ray project with HDV1080p25 video into H.264 format and apply different special effects to it.


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In terms of quality, the video encoding speed in Adobe media Encoder is not too much different from what wehave just seen with x264 codec. Summing everything up, I would like to stress that you can use Socket AM3 orLGA1156 processors with at least four cores for efficient work with media content.

Mathematical Calculations

We launch standard MathematicaMark7 test from Wolfram Mathematica suite to measure the systems’performance here.


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The best score belongs to Core i5-750 that has four cores with contemporary microarchitecture,high-performance memory controller and large L3 cache. This result is actually not surprising at all. What isreally surprising, that there is a dual-core LGA775 processor right next to it on the chart.

Final Rendering

We use special Cinebench test to measure the final rendering speed in Maxon Cinema 4D.


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The more cores there are, the higher is the performance. This principle can be seen clearly in rendering tasks, soyou shouldn’t be surprised to see six-core processors outperform quad-core one, and quad-cores – the dual-coreones. If we compare the performance of processors with the same number of computational cores, we will seethat Socket AM3 and LGA1156 CPUs are always ahead of the LGA775 ones.

Rendering speed in Autodesk 3ds max 2011 with both, Scanline as well as Mental Ray, was measured usingSPECapc test.


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The relative rendering speed in 3ds max 2011 is very similar to the Cinebench results, although Intel processorsperform obviously better here. As a result, Core i5-750 is almost as fast as the six-core AMD CPU, Core 2 Quadfamily competes successfully against Athlon II X4, and dual-core Phenom II X2 takes the last place.

Power Consumption

Performance is not the only practical spec that may be of interest to potential buyers of mainstream CPUs. Inmany cases their power consumption matters a lot, as it has direct connection not only to the amount of yournext power bill. The same parameter sets certain restrictions and criteria when it comes to picking out a systemcase. Therefore, we decided to add power consumption tests to our performance research.

The graphs below show the full power draw of the computer (without the monitor) measured after the powersupply. It is the total of the power consumption of all the system components. The PSU's efficiency is not takeninto account. The CPUs are loaded by running the 64-bit LinX 0.6.4 utility. We enabled all the power-savingtechnologies for a correct measurement of the computer's power draw in idle mode: C1E, AMD Cool'n'Quiet andEnhanced Intel SpeedStep.


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All participating systems consume almost the same amount of power in idle mode: the difference between thebest and the worst score is less than 10 W. Athlon II X4 based platforms require a little less power. However, thesix-core Phenom II X ̂1055T, on the contrary, consumes more than the rest of the participants in idle mode.


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However, when it comes to power consumption under heavy load, the differences between tested systemsequipped with mainstream processors may exceed 70 W. Note that the worst results here belong to Phenom IIX4 and Phenom II X6, which means only one thing: mainstream processors from AMD are not that fit forenergy-efficient and quiet systems. Dual-core Intel products for LGA775 and LGA1156 platforms prove to bemuch more energy-efficient. However, even more power-hungry quad-core CPUs from this maker will offerbetter performance-to-power consumption rates than AMD CPUs.

Conclusion

There appeared to be quite a lot of processors in the mainstream price segment, but it is not that hard to singleout the most successful ones. Our extensive tests showed that all models split into several performance groupsquite clearly, so it is fairly easy for us to put together a list of recommendations for those who look to buy a CPUin the $100-$200 ballpark.

First of all, I have to stress one more time that LGA775 platform is a past stage of the computer evolution. Andthis conclusion is drawn not only from the age of this platform, or its outdated structure with the memorycontroller located outside the CPU. Even if we simply look at the benchmark scores, we will see that in all cases


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CPUs for more contemporary platforms can offer much better performance (this is especially true for dual-coreprocessors). Therefore, we would strongly recommend to avoid building new systems around Core 2 Duo orCore 2 Quad CPUs. Even if you are going to simply upgrade an LGA775 system, we would urge you to considerreplacing the entire platform, as it will have a much great effect in the long run.

Secondly, just like during our Value CPU performance research, we can’t help drawing your attention to thesuccess of Socket AM3 processors. Although, this is only true for quad- and six-core models. AMD adjustedtheir price list in such a way that in the sub-$180 price range, their processors are almost always the mostappealing choice. However, it doesn’t make up for the obvious drawbacks of the Socket Am3 platform: too highpower consumption and the lack of high-performance models that could be used for future upgrades.

Thirdly, we can’t leave the LGA1156 platform unnoticed. There are quite a few interesting options for thisplatform available today. For example, the 196-dollar Core i5-750 is an obvious favorite of this test session, as itappears at the top of many performance charts. If you are looking for something less expensive, then Core i3family may be able to offer you decent price-to-performance ratio. Although these are dual-core CPUs, Hyper-Threading technology makes them virtually quad-core, so they can really shine in quite a few tests.

In order to illustrate the correlation between the consumer qualities of the tested processors in the mainstreamprice segment, we put together the following diagram showing the average performance vs. average price.

This diagram suggests the following specific recommendations.

The today’s fastest mainstream processor is undoubtedly Intel Core i5-750. With four pretty fast cores andTurbo Boost technology support this LGA1156 CPU demonstrates high performance in resource-hungryapplications, as well as 3D games. In other words, this is a win-win choice. Intel Core i5-750 receives our


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Editor’s Choice title:

However, some of you may consider Core i5-750 to be overly expensive, and they will be right: this CPU costsalmost $200. In this case, we would recommend checking out the entire Phenom II X4 family: Phenom II

X4 955, Phenom II X4 965 and Phenom II X4 970. These processors work well in games, and are very effectivein a number of other tasks, like video editing, encryption and final rendering. The recipe for their appeal issimple: four “real” cores with high clock frequency and large L3 cache. Besides, do not forget about a nice littlebonus: an unlocked clock frequency multiplier.

As for the least expensive options, these are quad-core Athlon II X4 processors. Due to the fact that AMD isalways up-to-date regarding the situation in the market and adjusts the pricing accordingly, we would like torecommend Athlon II X4 645 and Athlon II X4 640 processors. These are the today’s most affordablequad-core processors, which is their primary trump. Of course, we don’t always need four cores, but thoseapplications that utilize the processor seriously enough will work way better on a system with quad- rather thandual-core CPU inside.

Summing up, we would like to say that AMD Phenom II X4 955, Phenom II X4 965, Phenom II X4 970,Athlon II X4 645 and Athlon II X4 640 receive our Recommended Buy title:

Core i3 processors also look very good. Of course, they lose to quad-core AMD products in terms of price-to-performance ratio they have to offer, because they have only two computational cores even with Hyper-Threading support. However, Intel has completely different advantages to offer. Core i3 processor family is notjust extremely energy-efficient, but these processors also feature an integrated graphics core, which is powerfulenough for HTPC systems and doesn’t require any additional cooling, because the regular CPU cooler is morethan enough for it. Therefore, Core i3 processors may become a great option for a quiet home system.

And the last recommendation will be for those users who would like to put together a relatively powerful


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computer system that would work best with well-paralleled tasks. The six-core Phenom II X6 1055T will be thebest bet for a platform like that: it offers unmatched performance during video transcoding and rendering in themainstream price segment. This processor is at the top of the price-to-performance diagram above, whichbecame possible after AMD’s last price reduction. However, keep in mind that far not every application iscapable of generating six parallel computational threads, so this six-core CPU may not be a good fit for a gamingsystem, for instance.


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CPU bench2.pdf

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Transcript of CPU bench2.pdf