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

Intro

Compare those specs to the Radeon HD 5750 512MB, which uses a 40 nm design. ATi has clocked the core frequency at 700 MHz. The GDDR5 RAM runs at a frequency of 1150 MHz on this particular model. It features 720(144x5) SPUs as well as 36 TAUs and 16 ROPs.

(No game benchmarks for this combination yet.)

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

The Radeon HD 5750 512MB should in theory perform a little bit faster than the GeForce 8800 GTS (G80) 640MB overall. (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 will be a small bit (more or less 2%) more effective at AF 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

The Radeon HD 5750 512MB is a little bit (approximately 9%) more effective at full screen anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and will be capable of handling higher resolutions better. (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 data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.