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GeForce GTX 560 vs Radeon HD 4870 X2

Intro

The GeForce GTX 560 uses a 40 nm design. nVidia has clocked the core speed at 810 MHz. The GDDR5 memory is set to run at a speed of 1001 MHz on this particular model. It features 336 SPUs along with 56 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 4870 X2, which comes with a clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 150 Watts
Radeon HD 4870 X2 350 Watts
Difference: 200 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 4870 X2 will be 80% faster than the GeForce GTX 560 in general, due to its greater bandwidth. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GTX 560 128128 MB/sec
Difference: 102272 (80%)

Texel Rate

The Radeon HD 4870 X2 will be a lot (approximately 32%) better at texture filtering than the GeForce GTX 560. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GTX 560 45360 Mtexels/sec
Difference: 14640 (32%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 560 is the winner, not by a very large margin though. (explain)

GeForce GTX 560 25920 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 1920 (8%)

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 560

Amazon.com

Check prices at:

Radeon HD 4870 X2

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 560 Radeon HD 4870 X2
Manufacturer nVidia AMD
Year May 2011 Aug 12, 2008
Code Name GF114 R700
Memory 1024 MB 1024 MB (x2)
Core Speed 810 MHz 750 MHz (x2)
Memory Speed 4004 MHz 3600 MHz (x2)
Power (Max TDP) 150 watts 350 watts
Bandwidth 128128 MB/sec 230400 MB/sec
Texel Rate 45360 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 25920 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 336 800(160x5) (x2)
Texture Mapping Units 56 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1950 million 956 million
Bus PCIe 2.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 560

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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