GeForce GT 220 GDDR3 vs GeForce GT 230

Intro

Compare those specifications to the GeForce GT 230, which has core clock speeds of 550 MHz on the GPU, and 800 MHz on the 1536 MB of DDR3 memory. It features 32 SPUs along with 16 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
GeForce GT 230		65 Watts
	Difference: 7 Watts (12%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 230 is 19% faster than the GeForce GT 220 GDDR3 in general, due to its greater bandwidth. (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 just a bit (approximately 14%) better 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 is a small bit (about 14%) better at full screen anti-aliasing than the GeForce GT 230, and will be capable of handling higher screen resolutions more effectively. (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 (in units of MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, 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 the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.