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

Intro

Compare those specifications to the GeForce 9800 GTX+, which features GPU core speed of 738 MHz, and 512 MB of GDDR3 RAM running at 1100 MHz through a 256-bit bus. It also features 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB		143 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 2 Watts (1%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ will be 11% faster than the GeForce 8800 GTS (G80) 320MB overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce 9800 GTX+ will be quite a bit (approximately 92%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 22608 (92%)

Pixel Rate

The GeForce 9800 GTX+ will be a bit (about 15%) more effective at FSAA than the GeForce 8800 GTS (G80) 320MB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 1548 (15%)

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 (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 output rate also depends on lots of 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.