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GeForce GTX 580 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 580 uses a 40 nm design. nVidia has set the core speed at 772 MHz. The GDDR5 RAM is set to run at a speed of 1002 MHz on this model. It features 512 SPUs as well as 64 TAUs and 48 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6950 2GB, which has 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 TAUs, and 32 ROPs.

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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

In theory, the GeForce GTX 580 should perform a bit faster than the Radeon HD 6950 2GB in general. (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%) better 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

The GeForce GTX 580 should be quite a bit (approximately 45%) faster with regards to FSAA than the Radeon HD 6950 2GB, and will be capable of handling higher resolutions better. (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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to 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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