GeForce GT 220 GDDR3 vs Radeon HD 4670 1GB

Intro

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

Memory Bandwidth

As far as performance goes, the Radeon HD 4670 1GB should theoretically be a bit better 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 is quite a bit (approximately 140%) more effective at anisotropic filtering 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

The Radeon HD 4670 1GB will be just a bit (more or less 20%) better at anti-aliasing than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions more effectively. (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 max amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 can be applied 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 the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.