GeForce GT 220 GDDR3 vs GeForce GT 230

Intro

Compare those specs to the GeForce GT 230, which features core 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

As far as performance goes, the GeForce GT 230 should theoretically be a bit better than the GeForce GT 220 GDDR3 overall. (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%) 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 should be a bit (more or less 14%) better at full screen anti-aliasing than the GeForce GT 230, and also will be able to handle higher resolutions without losing too much performance. (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 (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus 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 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.