GeForce GT 220 GDDR3 vs GeForce GTX 480

Intro

Compare those specifications to the GeForce GTX 480, which has a GPU core clock speed of 700 MHz, and 1536 MB of GDDR5 memory set to run at 924 MHz through a 384-bit bus. It also is comprised of 480 Stream Processors, 60 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 480		250 Watts
	Difference: 192 Watts (331%)

Memory Bandwidth

In theory, the GeForce GTX 480 should be 448% quicker than the GeForce GT 220 GDDR3 overall, because of its higher data rate. (explain)

GeForce GTX 480		177408 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 145024 (448%)

Texel Rate

The GeForce GTX 480 should be much (approximately 320%) faster with regards to anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 480		42000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 32000 (320%)

Pixel Rate

The GeForce GTX 480 is quite a bit (about 572%) more effective at full screen anti-aliasing than the GeForce GT 220 GDDR3, and capable of handling higher resolutions more effectively. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 28600 (572%)

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 maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.