GeForce 8800 Ultra vs GeForce GTS 450 1GB

Intro

Compare that to the GeForce GTS 450 1GB, which features GPU core speed of 783 MHz, and 1024 MB of GDDR5 RAM running at 902 MHz through a 128-bit bus. It also is comprised of 192 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 65 Watts (61%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra is 80% faster than the GeForce GTS 450 1GB overall, due to its higher data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 45952 (80%)

Texel Rate

The GeForce 8800 Ultra should be much (approximately 56%) faster with regards to AF than the GeForce GTS 450 1GB. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 14112 (56%)

Pixel Rate

The GeForce 8800 Ultra will be a little bit (about 17%) more effective at AA than the GeForce GTS 450 1GB, and will be able to handle higher resolutions better. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
GeForce GTS 450 1GB		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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.