GeForce 8800 GTS (G80) 640MB vs Radeon HD 5750 512MB

Intro

Compare those specifications to the Radeon HD 5750 512MB, which uses a 40 nm design. AMD has set the core frequency at 700 MHz. The GDDR5 RAM runs at a speed of 1150 MHz on this model. It features 720(144x5) SPUs along with 36 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 57 Watts (66%)

Memory Bandwidth

Theoretically, the Radeon HD 5750 512MB should perform a small bit faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 5750 512MB		73600 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 10240 (16%)

Texel Rate

The Radeon HD 5750 512MB should be a small bit (about 2%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 576 (2%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5750 512MB is superior to the GeForce 8800 GTS (G80) 640MB, not by a very large margin though. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 940 (9%)

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 (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, 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 maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.