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

Intro

Compare all of that to the GeForce GT 320, which has GPU core speed of 540 MHz, and 1024 MB of GDDR3 RAM running at 790 MHz through a 128-bit bus. It also is made up of 72 Stream Processors, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 100 Watts (233%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 320MB should theoretically perform quite a bit faster than the GeForce GT 320 overall. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 38080 (151%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB will be quite a bit (about 90%) more effective at texture filtering than the GeForce GT 320. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 11664 (90%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB is much (about 138%) better at AA than the GeForce GT 320, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 5940 (138%)

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 MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.