GeForce 8800 Ultra vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which has core speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 Ultra		171 Watts
Geforce GTX 680		195 Watts
	Difference: 24 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should perform quite a bit faster than the GeForce 8800 Ultra in general. (explain)

Geforce GTX 680		192256 MB/sec
GeForce 8800 Ultra		103680 MB/sec
	Difference: 88576 (85%)

Texel Rate

The Geforce GTX 680 should be quite a bit (approximately 229%) faster with regards to anisotropic filtering than the GeForce 8800 Ultra. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 89600 (229%)

Pixel Rate

The Geforce GTX 680 is much (about 119%) more effective at FSAA than the GeForce 8800 Ultra, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 17504 (119%)

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 (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.