GeForce 8800 GTS (G80) 640MB vs GeForce GTX 460

Intro

Compare those specs to the GeForce GTX 460, which has core clock speeds of 675 MHz on the GPU, and 900 MHz on the 768 MB of GDDR5 RAM. It features 336 SPUs along with 56 TAUs and 24 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 460		150 Watts
	Difference: 7 Watts (5%)

Memory Bandwidth

The GeForce GTX 460 should in theory be quite a bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce GTX 460		86400 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 23040 (36%)

Texel Rate

The GeForce GTX 460 is a lot (more or less 54%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 460		37800 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 13176 (54%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 460 is superior to the GeForce 8800 GTS (G80) 640MB, by a large margin. (explain)

GeForce GTX 460		16200 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 5940 (58%)

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 data (in units of MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.