GeForce 8800 GTX vs GeForce GTS 450

Intro

Compare that to the GeForce GTS 450, which features a GPU core clock speed of 783 MHz, and 512 MB of GDDR5 RAM running at 902 MHz through a 128-bit bus. It also is comprised of 192 Stream Processors, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce 8800 GTX		155 Watts
	Difference: 49 Watts (46%)

Memory Bandwidth

Theoretically, the GeForce 8800 GTX should perform much faster than the GeForce GTS 450 in general. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 28672 (50%)

Texel Rate

The GeForce 8800 GTX is a lot (approximately 47%) better at AF than the GeForce GTS 450. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 11744 (47%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 8800 GTX is the winner, though only just barely. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 1272 (10%)

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 largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record 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 clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.