GeForce 8800 GTS (G80) 320MB vs GeForce GTX 480

Intro

Compare those specifications to the GeForce GTX 480, which comes with GPU clock speed of 700 MHz, and 1536 MB of GDDR5 memory running at 924 MHz through a 384-bit bus. It also features 480 Stream Processors, 60 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB		143 Watts
GeForce GTX 480		250 Watts
	Difference: 107 Watts (75%)

Memory Bandwidth

Theoretically, the GeForce GTX 480 should be much faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

GeForce GTX 480		177408 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 114048 (180%)

Texel Rate

The GeForce GTX 480 will be much (about 71%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce GTX 480		42000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 17376 (71%)

Pixel Rate

The GeForce GTX 480 is much (about 227%) faster with regards to AA than the GeForce 8800 GTS (G80) 320MB, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 23340 (227%)

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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.