GeForce GT 220 GDDR3 vs GeForce GT 230

Intro

Compare those specs to the GeForce GT 230, which makes use of a 40 nm design. nVidia has clocked the core speed at 550 MHz. The DDR3 memory runs at a speed of 800 MHz on this specific model. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator 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

As far as performance goes, the GeForce GT 230 should in theory be a bit better than 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 should be a bit (about 14%) faster with regards to AF 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 should be just a bit (approximately 14%) better at FSAA than the GeForce GT 230, and also able to handle higher 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 information (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core 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 applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.