GeForce 8800 GTS (G80) 640MB vs Radeon HD 7750

Intro

Compare that to the Radeon HD 7750, which makes use of a 28 nm design. ATi has clocked the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this specific model. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 88 Watts (160%)

Memory Bandwidth

The Radeon HD 7750 should theoretically be a little bit faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 7750		72000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 8640 (14%)

Texel Rate

The Radeon HD 7750 is a little bit (more or less 4%) more effective at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 976 (4%)

Pixel Rate

The Radeon HD 7750 is quite a bit (more or less 25%) better at AA than the GeForce 8800 GTS (G80) 640MB, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 2540 (25%)

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 data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.