GeForce GT 220 GDDR3 vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory running at 1100 MHz through a 128-bit bus. It also is comprised of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 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 4670 1GB		70 Watts
	Difference: 12 Watts (21%)

Memory Bandwidth

The Radeon HD 4670 1GB should theoretically be just a bit faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon HD 4670 1GB		35200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 2816 (9%)

Texel Rate

The Radeon HD 4670 1GB will be quite a bit (more or less 140%) better at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 14000 (140%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4670 1GB is the winner, though not by far. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 1000 (20%)

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 (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card 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 maximum amount of pixels that the graphics card can possibly write to the local memory in one 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 sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). 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.