GeForce GT 220 GDDR3 vs Radeon HD 4850 512MB

Intro

Compare all of that to the Radeon HD 4850 512MB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 RAM works at a speed of 993 MHz on this particular model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

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

As far as performance goes, the Radeon HD 4850 512MB should in theory be a lot superior to 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 should be much (about 150%) faster with regards to AF 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 a better choice, by far. (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: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.