Intel Core i5-2500K Sandy Bridge GPU Performance Review 35

Intel Core i5-2500K Sandy Bridge GPU Performance Review



First of all, I would like to thank our friends at ASUS who provided the CPU and motherboards used. Without their help it wouldn't have been possible to create this article.

Intel has just announced their latest lineup of Core i5 processors. Sandy Bridge, as the new architecture is called by engineers is Intel's new microarchitecture, following Nehalem. The new processors are produced on Intel's 32 nm production process which has reached maturity over the last few months.

Unlike the last generation "Clarkdale" processor, Intel has integrated a quad-core CPU, graphics, cache, memory controller and PCI-Express connectivity into a single silicon die. Compared to a multi-chip module like on Clarkdale, this considerably reduces production cost and complexity.

Let's talk about the processor core quickly. It is a quad core design, that features Hyper-Threading technology on some models, which effectively doubles the number of threads to eight. Intel has performed several changes to the architecture to improve performance and performance per Watt, you can the full details in our Sandy Bridge CPU reviews which will be published shortly.

Intel is announcing many second generation Core Desktop processors today - they all feature integrated graphics when running on a H67 or Q67 motherboard chipset.
There are two major differences between the integrated graphics support. The first one (Clarkdale) is called "Intel HD Graphics 2000", and the other one (Sandy Bridge) is "Intel HD Graphics 3000".

Both are built on the same foundation but offer different performance levels. Intel HD Graphics 3000 offers 12 execution units (think "shaders"), whereas HD Graphics 2000 comes with only 6 of them. This means that essentially HD Graphics 3000 is twice as fast as HD Graphics 2000 when it comes to 3D applications.
Compared to the previous generation graphics cores, Intel has added substantial improvements to performance and features.
  • Accelerated video encoding. This will be useful if you transcode videos, to carry them on your mobile device for example. Instead of using the CPU or GPU shaders, Intel has given their new IGP dedicated hardware for MPEG2, VC1 and AVC encode and decode. The decoder units have also been improved compared to previous generations, but the real-life difference will be negligible.
  • Video Processing Accelerators. ATI and NVIDIA are offering extensive quality controls to adjust the experience of video playback to your likings with features like denoise, de-interlace, filtering and color correction. Intel has now added these features too in their graphics chip.
  • 4x Anti-Aliasing. Intel now supports up to 4x AA on their graphics core which means that if you play older titles that do not require a lot of graphics processing power, you can enable Anti-Aliasing to improve the visual quality of the games.
  • Support for DirectX 10.1. Yes, no DirectX 11 support. But given the limited power under the hood of Intel HD Graphics 2000 / 3000 this should not be too much of an issue.
  • Support for HDMI 1.4. This means that you can now play 3D Blu-ray content - if you have a player software, the movies and the proper output device configuration. This 3D movie stuff is still very new and there will likely be several technological changes before it becomes mainstream. Nevertheless it is a nice added feature.

Intel has extended their Turbo Boost clock scheme to include the graphics processor now. So when the CPU is lightly loaded, or not all cores are loaded, the graphics engine will be automagically bumped up in clock frequency up to 1100-1300 MHz depending on the CPU model. Intel's new Sandy Bridge CPUs all come with overclocking locked down pretty tight, except for the K models where the multipliers are unlocked, for the graphics core there is no difference, all models have unlocked graphics clocks.

Unfortunately there has been no help from Intel getting support for Intel HD Graphics 2000 / 3000 added to GPU-Z, but this might change in the future.

Test System

Test System: i5-2500K Sandy Bridge, GeForce 210, GT 430, HD 5450
CPU:Intel Core i5-2500K @ 3.33 GHz
(Sandy Bridge, 6144 KB Cache)
Motherboard:ASUS P8H67-M Evo, Intel H67
Memory:2x 2048 MB Mushkin Redline XP3-12800 DDR3
@ 1066 MHz 8-7-7-16
Software:Windows 7 64-bit
Drivers:Intel: 15.10.2219
NVIDIA: 260.99
ATI: Catalyst 10.12

Test System: i5-661 Clarkdale
CPU:Intel Core i5-661 @ 3.33 GHz
(Clarkdale, 4096 KB Cache)
Motherboard:ASUS P7H55-M Pro, Intel H55
Memory:2x 2048 MB Mushkin Redline XP3-12800 DDR3
@ 1066 MHz 8-7-7-16
Software:Windows 7 64-bit
Drivers:Intel: 15.17.12

Test System: Intel G45
CPU:Intel Core 2 Duo E6750 @ 2.66 GHz
(Conroe, 4096 KB Cache)
Motherboard:ASUS P5Q-EM, Intel G45
Memory:2x 2048 MB Mushkin XP2-8500 DDR2
@ 1000 MHz 5-5-5-15
Software:Windows 7 64-bit
Drivers:Intel: 15.17.12

Test System: NVIDIA ION
CPU:Intel Atom 330 @ 1.60 GHz
(Diamondville, 1024 KB Cache)
Memory:2x 2048 MB Mushkin XP2-8500 DDR2
@ 1000 MHz 5-6-6-20
Software:Windows 7 64-bit
Drivers:NVIDIA: 260.99

Test System: AMD 890GX
CPU:AMD Phenom II X2 550 @ 3.10 GHz
(Callisto, 8192 KB Cache)
Motherboard:MSI 890GXM-G65, AMD 890GX
Memory:2x 2048 MB Mushkin Redline XP3-12800 DDR3
@ 1066 MHz 8-7-7-16
Software:Windows 7 64-bit
Drivers:ATI: Catalyst 10.12


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