GeForce GT 220 GDDR3 vs Radeon HD 6750 1GB

Intro

Compare that to the Radeon HD 6750 1GB, which has a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 720 SPUs, 36 Texture Address Units, and 16 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 6750 1GB		86 Watts
	Difference: 28 Watts (48%)

Memory Bandwidth

Performance-wise, the Radeon HD 6750 1GB should in theory be quite a bit superior to the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 31616 (98%)

Texel Rate

The Radeon HD 6750 1GB will be much (more or less 161%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 16100 (161%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6750 1GB is a better choice, by far. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 6600 (132%)

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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure 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 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 that the graphics chip can 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 card's clock speed. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.