GeForce GT 220 GDDR3 vs Radeon HD 6870

Intro

Compare those specifications to the Radeon HD 6870, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this card. It features 1120 SPUs as well as 56 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 6870		151 Watts
	Difference: 93 Watts (160%)

Memory Bandwidth

In theory, the Radeon HD 6870 should be a lot faster than the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 6870		134400 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 102016 (315%)

Texel Rate

The Radeon HD 6870 should be much (about 404%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6870		50400 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 40400 (404%)

Pixel Rate

The Radeon HD 6870 is much (about 476%) faster with regards to FSAA than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 6870		28800 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 23800 (476%)

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 largest amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.