GeForce GT 220 GDDR3 vs GeForce GT 440 1.5GB

Intro

Compare those specs to the GeForce GT 440 1.5GB, which comes with a clock speed of 594 MHz and a GDDR3 memory speed of 900 MHz. It also features a 192-bit memory bus, and makes use of a 40 nm design. It is made up of 144 SPUs, 24 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 2 Watts (4%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 440 1.5GB will be 33% faster than the GeForce GT 220 GDDR3 in general, because of its greater bandwidth. (explain)

GeForce GT 440 1.5GB		43200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 10816 (33%)

Texel Rate

The GeForce GT 440 1.5GB should be a lot (more or less 43%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GT 440 1.5GB		14256 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 4256 (43%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 440 1.5GB is superior to the GeForce GT 220 GDDR3, and very much so. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 9256 (185%)

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 (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number 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 number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.