GeForce GTX 275 vs Radeon HD 7950 3GB

Intro

Compare that to the Radeon HD 7950 3GB, which comes with clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
GeForce GTX 275		219 Watts
	Difference: 19 Watts (10%)

Memory Bandwidth

The Radeon HD 7950 3GB should theoretically be a lot faster than the GeForce GTX 275 in general. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 112992 (89%)

Texel Rate

The Radeon HD 7950 3GB will be much (about 77%) better at anisotropic filtering than the GeForce GTX 275. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 38960 (77%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7950 3GB is the winner, and very much so. (explain)

Radeon HD 7950 3GB		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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.