GeForce 8800 Ultra vs GeForce GTX 660 Ti

Intro

Compare that to the GeForce GTX 660 Ti, which uses a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this card. It features 1344 SPUs along with 112 TAUs and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 21 Watts (14%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should be 39% faster than the GeForce 8800 Ultra in general, because of its higher bandwidth. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce 8800 Ultra		103680 MB/sec
	Difference: 40320 (39%)

Texel Rate

The GeForce GTX 660 Ti should be a lot (more or less 162%) more effective at texture filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 63312 (162%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 660 Ti is the winner, by far. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 7272 (50%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 reach the maximum fill rate.