GeForce GT 220 GDDR3 vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which features a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 800 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 50 Watts (86%)

Memory Bandwidth

Performance-wise, the Radeon HD 6770 1GB should theoretically be quite a bit superior to the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 34816 (108%)

Texel Rate

The Radeon HD 6770 1GB should be a lot (more or less 260%) faster with regards to texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 26000 (260%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6770 1GB is superior to the GeForce GT 220 GDDR3, by a large margin. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 9400 (188%)

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 information (measured in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 can be processed in one 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 better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.