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

Intro

Compare those specs to the GeForce 8800 GTX, which uses a 90 nm design. nVidia has set the core frequency at 575 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this specific model. It features 128 SPUs along with 64 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB		143 Watts
GeForce 8800 GTX		155 Watts
	Difference: 12 Watts (8%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GTX should in theory be a lot superior to the GeForce 8800 GTS (G80) 320MB in general. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 23040 (36%)

Texel Rate

The GeForce 8800 GTX will be much (approximately 49%) more effective at AF than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 12176 (49%)

Pixel Rate

The GeForce 8800 GTX should be quite a bit (more or less 35%) faster with regards to AA than the GeForce 8800 GTS (G80) 320MB, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 3540 (35%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.