GeForce GT 220 GDDR3 vs GeForce GT 440 3GB

Intro

Compare those specs to the GeForce GT 440 3GB, which has a clock speed of 594 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 192-bit memory bus, and makes use of a 40 nm design. It is made up of 144 SPUs, 24 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 2 Watts (4%)

Memory Bandwidth

As far as performance goes, the GeForce GT 440 3GB should in theory be much superior to the GeForce GT 220 GDDR3 overall. (explain)

GeForce GT 440 3GB		43200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 10816 (33%)

Texel Rate

The GeForce GT 440 3GB is quite a bit (about 43%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GT 440 3GB		14256 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 4256 (43%)

Pixel Rate

The GeForce GT 440 3GB will be much (approximately 185%) faster with regards to full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions better. (explain)

GeForce GT 440 3GB		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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card 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 colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.