GeForce 8800 GTX vs GeForce GTS 450 1GB

Intro

Compare all that to the GeForce GTS 450 1GB, which comes with GPU core speed of 783 MHz, and 1024 MB of GDDR5 RAM running at 902 MHz through a 128-bit bus. It also is made up of 192 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce 8800 GTX		155 Watts
	Difference: 49 Watts (46%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTX should perform much faster than the GeForce GTS 450 1GB in general. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 28672 (50%)

Texel Rate

The GeForce 8800 GTX is quite a bit (approximately 47%) faster with regards to texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 11744 (47%)

Pixel Rate

The GeForce 8800 GTX should be a little bit (about 10%) faster with regards to anti-aliasing than the GeForce GTS 450 1GB, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce GTS 450 1GB		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 data (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.