GeForce GTX 275 vs Radeon HD 6950 2GB

Intro

Compare those specs to the Radeon HD 6950 2GB, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB		200 Watts
GeForce GTX 275		219 Watts
	Difference: 19 Watts (10%)

Memory Bandwidth

The Radeon HD 6950 2GB should theoretically perform much faster than the GeForce GTX 275 overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 32992 (26%)

Texel Rate

The Radeon HD 6950 2GB should be much (about 39%) better at texture filtering than the GeForce GTX 275. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 19760 (39%)

Pixel Rate

The Radeon HD 6950 2GB will be much (more or less 44%) better at anti-aliasing than the GeForce GTX 275, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 7876 (44%)

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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.