GeForce 8800 Ultra vs GeForce GTS 450

Intro

Compare those specs to the GeForce GTS 450, which has core speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 65 Watts (61%)

Memory Bandwidth

The GeForce 8800 Ultra, in theory, should be much faster than the GeForce GTS 450 in general. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 45952 (80%)

Texel Rate

The GeForce 8800 Ultra will be much (about 56%) better at texture filtering than the GeForce GTS 450. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 14112 (56%)

Pixel Rate

The GeForce 8800 Ultra should be a little bit (about 17%) faster with regards to FSAA than the GeForce GTS 450, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 2160 (17%)

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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This 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 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 most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs 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 is also dependant 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 max fill rate.