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GeForce GTX 580 vs Radeon HD 6950

Intro

The GeForce GTX 580 has a core clock speed of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also makes use of a 384-bit memory bus, and uses a 40 nm design. It is made up of 512 SPUs, 64 TAUs, and 48 ROPs.

Compare all of that to the Radeon HD 6950, which has core speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs along with 88 TAUs and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 580 4956 points
Radeon HD 6950 3240 points
Difference: 1716 (53%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform a bit faster than the Radeon HD 6950 overall. (explain)

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

Texel Rate

The Radeon HD 6950 will be a lot (approximately 42%) better at anisotropic filtering than the GeForce GTX 580. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 580 is a better choice, by a large margin. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 6950 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

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
Manufacturer nVidia AMD
Year November 2010 December 2010
Code Name GF110 Cayman Pro
Memory 1536 MB 1024 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 (in units of megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6950

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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