GeForce GT 220 GDDR3 vs GeForce GT 240 GDDR5

Intro

Compare those specs to the GeForce GT 240 GDDR5, which has core clock speeds of 550 MHz on the GPU, and 850 MHz on the 512 MB of GDDR5 memory. It features 96 SPUs as well as 32 TAUs 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		70 Watts
	Difference: 12 Watts (21%)

Memory Bandwidth

The GeForce GT 240 GDDR5 should in theory perform quite a bit faster than the GeForce GT 220 GDDR3 in general. (explain)

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

Texel Rate

The GeForce GT 240 GDDR5 will be quite a bit (more or less 76%) more effective at AF than the GeForce GT 220 GDDR3. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 220 GDDR3 is a better choice, though not by far. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
GeForce GT 240 GDDR5		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 max amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.