GeForce 8800 GTS (G80) 640MB vs GeForce GTX 550 Ti

Intro

Compare those specs to the GeForce GTX 550 Ti, which comes with a clock frequency of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also uses a 192-bit bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti		116 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 27 Watts (23%)

Memory Bandwidth

Performance-wise, the GeForce GTX 550 Ti should theoretically be quite a bit superior to the GeForce 8800 GTS (G80) 640MB in general. (explain)

GeForce GTX 550 Ti		98496 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 35136 (55%)

Texel Rate

The GeForce GTX 550 Ti is a little bit (more or less 17%) faster with regards to AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 4176 (17%)

Pixel Rate

The GeForce GTX 550 Ti should be a lot (approximately 111%) more effective at FSAA than the GeForce 8800 GTS (G80) 640MB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 11340 (111%)

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 max amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.