GeForce 8800 GTS (G80) 640MB vs GeForce GTX 470

Intro

Compare all of that to the GeForce GTX 470, which comes with clock speeds of 607 MHz on the GPU, and 837 MHz on the 1280 MB of GDDR5 RAM. It features 448 SPUs along with 56 TAUs and 40 Rasterization Operator 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 470		215 Watts
	Difference: 72 Watts (50%)

Memory Bandwidth

In theory, the GeForce GTX 470 should be quite a bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce GTX 470		133920 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 70560 (111%)

Texel Rate

The GeForce GTX 470 is much (about 38%) faster with regards to AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 470		33992 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 9368 (38%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 470 is a better choice, by a large margin. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 14020 (137%)

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 information (measured in MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.