GeForce GT 220 GDDR3 vs Radeon HD 6970

Intro

Compare those specs to the Radeon HD 6970, which has GPU clock speed of 880 MHz, and 2048 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 6970		250 Watts
	Difference: 192 Watts (331%)

Memory Bandwidth

In theory, the Radeon HD 6970 is 443% quicker than the GeForce GT 220 GDDR3 overall, because of its higher bandwidth. (explain)

Radeon HD 6970		176000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 143616 (443%)

Texel Rate

The Radeon HD 6970 will be a lot (more or less 745%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6970		84480 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 74480 (745%)

Pixel Rate

The Radeon HD 6970 will be much (about 463%) better at AA than the GeForce GT 220 GDDR3, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6970		28160 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 23160 (463%)

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 data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core clock 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 write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs 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 output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.