GeForce GT 220 GDDR3 vs Radeon HD 3690/3830

Intro

Compare those specifications to the Radeon HD 3690/3830, which comes with a GPU core clock speed of 668 MHz, and 256 MB of GDDR3 memory set to run at 828 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 16 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 3690/3830		75 Watts
	Difference: 17 Watts (29%)

Memory Bandwidth

Theoretically, the GeForce GT 220 GDDR3 should perform quite a bit faster than the Radeon HD 3690/3830 in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 5888 (22%)

Texel Rate

The Radeon HD 3690/3830 will be a small bit (about 7%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 3690/3830		10688 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 688 (7%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 3690/3830 is the winner, by far. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 5688 (114%)

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 data (counted in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.