GeForce 8800 GTS (G80) 640MB vs GeForce GTX 570

Intro

Compare those specs to the GeForce GTX 570, which uses a 40 nm design. nVidia has clocked the core speed at 732 MHz. The GDDR5 memory is set to run at a frequency of 950 MHz on this specific model. It features 480 SPUs along with 60 TAUs and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB		143 Watts
GeForce GTX 570		219 Watts
	Difference: 76 Watts (53%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 570 should in theory be quite a bit superior to the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 88640 (140%)

Texel Rate

The GeForce GTX 570 will be quite a bit (more or less 78%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 19296 (78%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 570 is a better choice, by far. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 19020 (185%)

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 maximum amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.