GeForce 8800 GT 1GB vs GeForce 8800 GTS (G80) 320MB

Intro

Compare those specifications to the GeForce 8800 GTS (G80) 320MB, which features a clock speed of 513 MHz and a GDDR3 memory speed of 792 MHz. It also features a 320-bit bus, and makes use of a 90 nm design. It features 96 SPUs, 48 TAUs, and 20 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB		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% faster than the GeForce 8800 GT 1GB overall, because of its greater bandwidth. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 5760 (10%)

Texel Rate

The GeForce 8800 GT 1GB will be much (approximately 36%) faster with regards to AF than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 8800 GT 1GB		33600 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 8976 (36%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be a little bit (about 7%) more effective at full screen anti-aliasing than the GeForce 8800 GT 1GB, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce 8800 GT 1GB		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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.