GeForce 8800 GT 512MB vs GeForce 8800 GTS (G80) 320MB

Intro

Compare that to the GeForce 8800 GTS (G80) 320MB, which has core clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 RAM. It features 96 SPUs as well as 48 Texture Address Units and 20 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 38 Watts (36%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 320MB is 10% quicker than the GeForce 8800 GT 512MB in general, due to its higher bandwidth. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 5760 (10%)

Texel Rate

The GeForce 8800 GT 512MB is a lot (more or less 36%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 8976 (36%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be just a bit (more or less 7%) better at anti-aliasing than the GeForce 8800 GT 512MB, and should be able to handle higher screen resolutions better. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 660 (7%)

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 information (counted in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at handling 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 could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the bandwidth is, the lower the ability to get to the max fill rate.