GeForce 8500 GT vs GeForce GT 220 GDDR3

Intro

Compare those specs to the GeForce GT 220 GDDR3, which has core clock speeds of 625 MHz on the GPU, and 1012 MHz on the 512 MB of GDDR3 memory. It features 48 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 13 Watts (29%)

Memory Bandwidth

The GeForce GT 220 GDDR3, in theory, should perform quite a bit faster than the GeForce 8500 GT overall. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 19584 (153%)

Texel Rate

The GeForce GT 220 GDDR3 is much (approximately 178%) better at texture filtering than the GeForce 8500 GT. (explain)

GeForce GT 220 GDDR3		10000 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 6400 (178%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 220 GDDR3 is superior to the GeForce 8500 GT, and very much so. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 3200 (178%)

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 (measured in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.