GeForce GT 220 GDDR3 vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs 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 5770		108 Watts
	Difference: 50 Watts (86%)

Memory Bandwidth

The Radeon HD 5770 should in theory perform quite a bit faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 44416 (137%)

Texel Rate

The Radeon HD 5770 will be much (more or less 240%) faster with regards to anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 24000 (240%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5770 is the winner, and very much so. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 8600 (172%)

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 maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.