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GeForce GTX 570 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 570 has a GPU clock speed of 732 MHz, and the 1280 MB of GDDR5 RAM is set to run at 950 MHz through a 320-bit bus. It also is comprised of 480 Stream Processors, 60 Texture Address Units, and 40 ROPs.

Compare those specifications to the Radeon HD 3870 X2 1GB, which features a core clock frequency of 825 MHz and a GDDR4 memory frequency of 1126 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 570 will be 5% quicker than the Radeon HD 3870 X2 1GB in general, because of its higher data rate. (explain)

GeForce GTX 570 152000 MB/sec
Radeon HD 3870 X2 1GB 144128 MB/sec
Difference: 7872 (5%)

Texel Rate

The GeForce GTX 570 is quite a bit (more or less 66%) better at texture filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 570 43920 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 17520 (66%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 570 is the winner, but it probably won't make a huge difference. (explain)

GeForce GTX 570 29280 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 2880 (11%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 570

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 570 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year December 2010 Jan 28, 2008
Code Name GF110 R680
Memory 1280 MB 1024 MB (x2)
Core Speed 732 MHz 825 MHz (x2)
Memory Speed 3800 MHz 2252 MHz (x2)
Power (Max TDP) 219 watts (Unknown) watts
Bandwidth 152000 MB/sec 144128 MB/sec
Texel Rate 43920 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 480 320(64x5) (x2)
Texture Mapping Units 60 16 (x2)
Render Output Units 40 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 320-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 3000 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 570

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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