GeForce 8500 GT vs GeForce GTS 450

Intro

Compare all of that to the GeForce GTS 450, which has a GPU core clock speed of 783 MHz, and 512 MB of GDDR5 RAM set to run at 902 MHz through a 128-bit bus. It also features 192 Stream Processors, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
GeForce GTS 450		106 Watts
	Difference: 61 Watts (136%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 will be 351% quicker than the GeForce 8500 GT overall, due to its greater data rate. (explain)

GeForce GTS 450		57728 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 44928 (351%)

Texel Rate

The GeForce GTS 450 will be much (approximately 596%) better at anisotropic filtering than the GeForce 8500 GT. (explain)

GeForce GTS 450		25056 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 21456 (596%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 is superior to the GeForce 8500 GT, and very much so. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 10728 (596%)

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 data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.