GeForce GT 220 GDDR3 vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which comes with clock speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 12 Watts (21%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 220 GDDR3 should be just a bit faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 384 (1%)

Texel Rate

The Radeon HD 4670 512MB should be much (more or less 140%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 14000 (140%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4670 512MB is superior to the GeForce GT 220 GDDR3, but it probably won't make a huge difference. (explain)

Radeon HD 4670 512MB		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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.