GeForce 8800 Ultra vs GeForce GTX 275

Intro

Compare all of that to the GeForce GTX 275, which uses a 55 nm design. nVidia has set the core frequency at 633 MHz. The GDDR3 RAM runs at a speed of 1134 MHz on this model. It features 240 SPUs along with 80 Texture Address Units and 28 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 275		219 Watts
	Difference: 48 Watts (28%)

Memory Bandwidth

The GeForce GTX 275, in theory, should be a lot faster than the GeForce 8800 Ultra overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce 8800 Ultra		103680 MB/sec
	Difference: 23328 (23%)

Texel Rate

The GeForce GTX 275 will be quite a bit (more or less 29%) better at texture filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce 8800 Ultra		39168 Mtexels/sec
	Difference: 11472 (29%)

Pixel Rate

The GeForce GTX 275 should be much (approximately 21%) faster with regards to AA than the GeForce 8800 Ultra, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce 8800 Ultra		14688 Mpixels/sec
	Difference: 3036 (21%)

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 (counted in MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, 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 amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.