GeForce 8800 GTS (G80) 640MB vs GeForce GT 440 1.5GB

Intro

Compare those specs to the GeForce GT 440 1.5GB, which has clock speeds of 594 MHz on the GPU, and 900 MHz on the 1536 MB of GDDR3 memory. It features 144 SPUs along with 24 TAUs and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 87 Watts (155%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G80) 640MB should in theory be quite a bit superior to the GeForce GT 440 1.5GB in general. (explain)

GeForce 8800 GTS (G80) 640MB		63360 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 20160 (47%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB should be a lot (more or less 73%) more effective at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 10368 (73%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 440 1.5GB is a better choice, by a large margin. (explain)

GeForce GT 440 1.5GB		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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling 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 the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.