GeForce GT 220 GDDR3 vs Radeon HD 3690/3830

Intro

Compare those specifications to the Radeon HD 3690/3830, which makes use of a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 RAM is set to run at a frequency of 828 MHz on this particular model. It features 320(64x5) SPUs along with 16 TAUs and 16 Rasterization Operator Units.

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

The GeForce GT 220 GDDR3, in theory, should be much 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 (approximately 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 a high screen resolution is important to you, then the Radeon HD 3690/3830 is superior to the GeForce GT 220 GDDR3, by a large margin. (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 max amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.