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

Intro

Compare those specs to the GeForce GTX 570, which features GPU clock speed of 732 MHz, and 1280 MB of GDDR5 RAM running at 950 MHz through a 320-bit bus. It also is comprised of 480 SPUs, 60 Texture Address Units, and 40 Raster Operation Units.

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

Performance-wise, the GeForce GTX 570 should theoretically be a lot better than the GeForce 8800 GTS (G80) 640MB in general. (explain)

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

Texel Rate

The GeForce GTX 570 should be quite a bit (approximately 78%) better at texture 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

The GeForce GTX 570 will be a lot (approximately 185%) more effective at FSAA than the GeForce 8800 GTS (G80) 640MB, and will be capable of handling higher resolutions better. (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 largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.