GeForce GT 220 GDDR3 vs Radeon HD 6950

Intro

Compare those specifications to the Radeon HD 6950, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs as well as 88 Texture Address Units 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 6950		200 Watts
	Difference: 142 Watts (245%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 should theoretically be quite a bit better than the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 6950		160000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 127616 (394%)

Texel Rate

The Radeon HD 6950 is a lot (approximately 604%) better at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6950		70400 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 60400 (604%)

Pixel Rate

The Radeon HD 6950 will be a lot (more or less 412%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 6950		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 (in units of MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once 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, HDR and high resolutions.

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

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