GeForce 8800 GTS (G80) 640MB vs GeForce GT 440 3GB

Intro

Compare all that to the GeForce GT 440 3GB, which comes with a GPU core clock speed of 594 MHz, and 3072 MB of GDDR3 RAM running at 900 MHz through a 192-bit bus. It also features 144 Stream Processors, 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 3GB		56 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 87 Watts (155%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 640MB, in theory, should perform a lot faster than the GeForce GT 440 3GB in general. (explain)

GeForce 8800 GTS (G80) 640MB		63360 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 20160 (47%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB will be a lot (about 73%) faster with regards to texture filtering than the GeForce GT 440 3GB. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 10368 (73%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 440 3GB is the winner, by a large margin. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 3996 (39%)

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 (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.