GeForce 8800 GTX vs GeForce GTS 450

Intro

Compare those specs to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 RAM runs at a speed of 902 MHz on this particular model. It features 192 SPUs along with 32 TAUs 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 a lot faster than the GeForce GTS 450 overall. (explain)

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

Texel Rate

The GeForce 8800 GTX will be a lot (approximately 47%) better at anisotropic filtering than the GeForce GTS 450. (explain)

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

Pixel Rate

The GeForce 8800 GTX should be just a bit (about 10%) more effective at full screen anti-aliasing than the GeForce GTS 450, and also should be capable of handling higher screen resolutions without slowing down too much. (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 max amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.