GeForce GT 220 GDDR3 vs GeForce GT 230

Intro

Compare all that to the GeForce GT 230, which comes with a clock speed of 550 MHz and a DDR3 memory speed of 800 MHz. It also uses a 192-bit bus, and uses a 40 nm design. It features 32 SPUs, 16 TAUs, 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
GeForce GT 230		65 Watts
	Difference: 7 Watts (12%)

Memory Bandwidth

Performance-wise, the GeForce GT 230 should theoretically be a bit superior to the GeForce GT 220 GDDR3 in general. (explain)

GeForce GT 230		38400 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 6016 (19%)

Texel Rate

The GeForce GT 220 GDDR3 is a bit (approximately 14%) more effective at anisotropic filtering than the GeForce GT 230. (explain)

GeForce GT 220 GDDR3		10000 Mtexels/sec
GeForce GT 230		8800 Mtexels/sec
	Difference: 1200 (14%)

Pixel Rate

The GeForce GT 220 GDDR3 will be a little bit (about 14%) faster with regards to AA than the GeForce GT 230, and also should be capable of handling higher screen resolutions better. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
GeForce GT 230		4400 Mpixels/sec
	Difference: 600 (14%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.