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GeForce GTX 580 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 580 has core speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 memory. It features 512 SPUs as well as 64 TAUs and 48 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6950 2GB, which comes with a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 1408 Stream Processors, 88 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB 200 Watts
GeForce GTX 580 244 Watts
Difference: 44 Watts (22%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 should be 20% quicker than the Radeon HD 6950 2GB in general, due to its higher bandwidth. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 32384 (20%)

Texel Rate

The Radeon HD 6950 2GB should be a lot (about 42%) more effective at texture filtering than the GeForce GTX 580. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 20992 (42%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 580 is superior to the Radeon HD 6950 2GB, and very much so. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 11456 (45%)

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

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 580 Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year November 2010 December 2010
Code Name GF110 Cayman Pro
Memory 1536 MB 2048 MB
Core Speed 772 MHz 800 MHz
Memory Speed 4008 MHz 5000 MHz
Power (Max TDP) 244 watts 200 watts
Bandwidth 192384 MB/sec 160000 MB/sec
Texel Rate 49408 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 512 1408
Texture Mapping Units 64 88
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 2640 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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