GeForce 8800 Ultra vs GeForce GTX 570

Intro

Compare all that to the GeForce GTX 570, which features a GPU core clock speed of 732 MHz, and 1280 MB of GDDR5 memory running at 950 MHz through a 320-bit bus. It also is comprised of 480 Stream Processors, 60 Texture Address Units, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 Ultra		171 Watts
GeForce GTX 570		219 Watts
	Difference: 48 Watts (28%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 570 is 47% quicker than the GeForce 8800 Ultra in general, due to its greater bandwidth. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 8800 Ultra		103680 MB/sec
	Difference: 48320 (47%)

Texel Rate

The GeForce GTX 570 will be just a bit (more or less 12%) better at texture filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 4752 (12%)

Pixel Rate

The GeForce GTX 570 should be quite a bit (more or less 99%) more effective at full screen anti-aliasing than the GeForce 8800 Ultra, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 14592 (99%)

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 information (measured in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.