GeForce GT 220 GDDR3 vs Radeon HD 4850 512MB

Intro

Compare those specs to the Radeon HD 4850 512MB, which uses a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 RAM is set to run at a speed of 993 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator 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 speaking, the Radeon HD 4850 512MB should be much faster than the GeForce GT 220 GDDR3 overall. (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 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

The Radeon HD 4850 512MB should be quite a bit (more or less 100%) faster with regards to FSAA than the GeForce GT 220 GDDR3, and capable of handling higher resolutions while still performing well. (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 max amount of data (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the 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 the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.