GeForce GT 220 GDDR3 vs Radeon HD 7870 XT

Intro

Compare those specs to the Radeon HD 7870 XT, which has GPU core speed of 925 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 127 Watts (219%)

Memory Bandwidth

In theory, the Radeon HD 7870 XT is 493% quicker than the GeForce GT 220 GDDR3 overall, due to its greater data rate. (explain)

Radeon HD 7870 XT		192000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 159616 (493%)

Texel Rate

The Radeon HD 7870 XT should be a lot (more or less 788%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 78800 (788%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7870 XT is superior to the GeForce GT 220 GDDR3, and very much so. (explain)

Radeon HD 7870 XT		29600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 24600 (492%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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