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GeForce GTX 580 vs Radeon HD 7870


The GeForce GTX 580 comes with a clock frequency of 772 MHz and a GDDR5 memory frequency of 1002 MHz. It also uses a 384-bit memory bus, and uses a 40 nm design. It is comprised of 512 SPUs, 64 TAUs, and 48 ROPs.

Compare all that to the Radeon HD 7870, which features core speeds of 1000 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
GeForce GTX 580 244 Watts
Difference: 69 Watts (39%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform a lot faster than the Radeon HD 7870 in general. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 38784 (25%)

Texel Rate

The Radeon HD 7870 is quite a bit (more or less 62%) faster with regards to texture filtering than the GeForce GTX 580. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 30592 (62%)

Pixel Rate

The GeForce GTX 580 will be just a bit (about 16%) more effective at anti-aliasing than the Radeon HD 7870, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 7870 32000 Mpixels/sec
Difference: 5056 (16%)

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.

Price Comparison

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GeForce GTX 580

Radeon HD 7870

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.


Display Specifications

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Model GeForce GTX 580 Radeon HD 7870
Manufacturer nVidia AMD
Year November 2010 March 2012
Code Name GF110 Pitcairn XT
Memory 1536 MB 2048 MB
Core Speed 772 MHz 1000 MHz
Memory Speed 4008 MHz 4800 MHz
Power (Max TDP) 244 watts 175 watts
Bandwidth 192384 MB/sec 153600 MB/sec
Texel Rate 49408 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 512 1280
Texture Mapping Units 64 80
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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


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