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GeForce GTX 570 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 570 makes use of a 40 nm design. nVidia has set the core speed at 732 MHz. The GDDR5 RAM runs at a frequency of 950 MHz on this specific card. It features 480 SPUs as well as 60 TAUs and 40 ROPs.

Compare that to the Radeon HD 3870 X2 1GB, which features core speeds of 825 MHz on the GPU, and 1126 MHz on the 1024 MB of GDDR4 memory. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 570 is 5% quicker than the Radeon HD 3870 X2 1GB overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 570 should be quite a bit (about 66%) faster with regards to anisotropic 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 screen resolution is important to you, then the GeForce GTX 570 is superior to the Radeon HD 3870 X2 1GB, but only just. (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

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Radeon HD 3870 X2 1GB

Amazon.com

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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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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