GeForce GT 220 GDDR3 vs GeForce GT 240 GDDR5 1GB

Intro

Compare those specs to the GeForce GT 240 GDDR5 1GB, which makes use of a 40 nm design. nVidia has clocked the core speed at 550 MHz. The GDDR5 RAM is set to run at a frequency of 850 MHz on this card. It features 96 SPUs as well as 32 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 240 GDDR5 1GB		70 Watts
	Difference: 12 Watts (21%)

Memory Bandwidth

In theory, the GeForce GT 240 GDDR5 1GB should be 68% quicker than the GeForce GT 220 GDDR3 overall, because of its greater bandwidth. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 22016 (68%)

Texel Rate

The GeForce GT 240 GDDR5 1GB should be quite a bit (more or less 76%) faster with regards to anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 7600 (76%)

Pixel Rate

The GeForce GT 220 GDDR3 is just a bit (approximately 14%) more effective at anti-aliasing than the GeForce GT 240 GDDR5 1GB, and will be able to handle higher resolutions more effectively. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.