GeForce 8800 GT 512MB vs GeForce GT 220 GDDR3

Intro

Compare those specs to the GeForce GT 220 GDDR3, which comes with core speeds of 625 MHz on the GPU, and 1012 MHz on the 512 MB of GDDR3 memory. It features 48 SPUs along with 16 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 47 Watts (81%)

Memory Bandwidth

The GeForce 8800 GT 512MB, in theory, should be a lot faster than the GeForce GT 220 GDDR3 overall. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 25216 (78%)

Texel Rate

The GeForce 8800 GT 512MB is quite a bit (approximately 236%) better at AF than the GeForce GT 220 GDDR3. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 23600 (236%)

Pixel Rate

The GeForce 8800 GT 512MB will be quite a bit (about 92%) faster with regards to AA than the GeForce GT 220 GDDR3, and also able to handle higher screen resolutions better. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 4600 (92%)

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 megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.