GeForce GT 220 GDDR3 vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 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 in theory perform quite a bit faster than the GeForce GT 220 GDDR3 in general. (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 (about 796%) faster with regards to anisotropic 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

The Radeon HD 7950 3GB should be a lot (approximately 412%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also should be able to handle higher screen resolutions more effectively. (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 maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.