GeForce GT 220 GDDR3 vs Radeon HD 7950 3GB

Intro

Compare that to the Radeon HD 7950 3GB, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 142 Watts (245%)

Memory Bandwidth

The Radeon HD 7950 3GB should theoretically perform quite a bit faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 207616 (641%)

Texel Rate

The Radeon HD 7950 3GB should be much (more or less 796%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 79600 (796%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 3GB is the winner, by a large margin. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 20600 (412%)

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 (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.