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GeForce GTX 480 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 480 features a clock frequency of 700 MHz and a GDDR5 memory frequency of 924 MHz. It also features a 384-bit bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 60 TAUs, and 48 Raster Operation Units.

Compare those specs to the Radeon HD 6950 2GB, which features a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1408 Stream Processors, 88 TAUs, 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 480 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

The GeForce GTX 480 should in theory perform just a bit faster than the Radeon HD 6950 2GB in general. (explain)

GeForce GTX 480 177408 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 17408 (11%)

Texel Rate

The Radeon HD 6950 2GB should be quite a bit (more or less 68%) better at AF than the GeForce GTX 480. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
GeForce GTX 480 42000 Mtexels/sec
Difference: 28400 (68%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 480 is the winner, by a large margin. (explain)

GeForce GTX 480 33600 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 8000 (31%)

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 480

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 480 Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year March 2010 December 2010
Code Name GF100 Cayman Pro
Memory 1536 MB 2048 MB
Core Speed 700 MHz 800 MHz
Memory Speed 3696 MHz 5000 MHz
Power (Max TDP) 250 watts 200 watts
Bandwidth 177408 MB/sec 160000 MB/sec
Texel Rate 42000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 480 1408
Texture Mapping Units 60 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 max amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units 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 also depends on quite a few other factors, especially 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 480

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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