GeForce 8800 GTS (G80) 640MB vs GeForce GTX 460 2GB

Intro

Compare that to the GeForce GTX 460 2GB, which makes use of a 40 nm design. nVidia has set the core frequency at 675 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this specific card. It features 336 SPUs along with 56 TAUs and 32 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 2GB		160 Watts
	Difference: 17 Watts (12%)

Memory Bandwidth

The GeForce GTX 460 2GB, in theory, should be a lot faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce GTX 460 2GB		115200 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 51840 (82%)

Texel Rate

The GeForce GTX 460 2GB should be much (more or less 54%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 13176 (54%)

Pixel Rate

The GeForce GTX 460 2GB is quite a bit (more or less 111%) faster with regards to FSAA than the GeForce 8800 GTS (G80) 640MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 11340 (111%)

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 max amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.