GeForce GT 220 GDDR3 vs GeForce GTX 750 Ti

Intro

Compare that to the GeForce GTX 750 Ti, which comes with a clock frequency of 1020 MHz and a GDDR5 memory speed of 1350 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 750 Ti		60 Watts
	Difference: 2 Watts (3%)

Memory Bandwidth

In theory, the GeForce GTX 750 Ti is 167% quicker than the GeForce GT 220 GDDR3 overall, because of its greater bandwidth. (explain)

GeForce GTX 750 Ti		86400 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 54016 (167%)

Texel Rate

The GeForce GTX 750 Ti will be quite a bit (more or less 308%) faster with regards to texture filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 30800 (308%)

Pixel Rate

The GeForce GTX 750 Ti is a lot (about 226%) better at AA than the GeForce GT 220 GDDR3, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 11320 (226%)

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 (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.