GeForce 8800 GTS (G80) 320MB vs GeForce 9800 GTX

Intro

Compare those specs to the GeForce 9800 GTX, which uses a 65 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR3 memory runs at a speed of 1100 MHz on this specific model. It features 128 SPUs along with 64 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 3 Watts (2%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX should theoretically be just a bit superior to the GeForce 8800 GTS (G80) 320MB overall. (explain)

GeForce 9800 GTX		70400 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 7040 (11%)

Texel Rate

The GeForce 9800 GTX is quite a bit (approximately 75%) better at AF than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 18576 (75%)

Pixel Rate

The GeForce 9800 GTX is a bit (about 5%) faster with regards to anti-aliasing than the GeForce 8800 GTS (G80) 320MB, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce 9800 GTX		10800 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 540 (5%)

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 maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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