GeForce GT 220 GDDR3 vs Radeon HD 6670 (OEM)

Intro

Compare that to the Radeon HD 6670 (OEM), which comes with GPU clock speed of 800 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 480 Stream Processors, 24 Texture Address Units, 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 6670 (OEM)		63 Watts
	Difference: 5 Watts (9%)

Memory Bandwidth

In theory, the Radeon HD 6670 (OEM) is 98% faster than the GeForce GT 220 GDDR3 overall, because of its greater bandwidth. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 31616 (98%)

Texel Rate

The Radeon HD 6670 (OEM) is much (more or less 92%) faster with regards to anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 6670 (OEM)		19200 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 9200 (92%)

Pixel Rate

The Radeon HD 6670 (OEM) is quite a bit (more or less 28%) more effective at FSAA than the GeForce GT 220 GDDR3, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 6670 (OEM)		6400 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 1400 (28%)

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 transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.