GeForce GT 220 GDDR3 vs Radeon HD 4850 512MB

Intro

Compare that to the Radeon HD 4850 512MB, which has GPU clock speed of 625 MHz, and 512 MB of GDDR3 memory set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 52 Watts (90%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 512MB should perform a lot faster than the GeForce GT 220 GDDR3 in general. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 31168 (96%)

Texel Rate

The Radeon HD 4850 512MB is quite a bit (approximately 150%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 15000 (150%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4850 512MB is the winner, and very much so. (explain)

Radeon HD 4850 512MB		10000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 5000 (100%)

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 information (measured in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If 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, 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 calculated by multiplying the total 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per 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 sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.