GeForce 8800 GT 512MB vs GeForce GT 440 1.5GB

Intro

Compare all that to the GeForce GT 440 1.5GB, which features clock speeds of 594 MHz on the GPU, and 900 MHz on the 1536 MB of GDDR3 memory. It features 144 SPUs as well as 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 GT 512MB		105 Watts
	Difference: 49 Watts (88%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GT 512MB should theoretically be quite a bit better than the GeForce GT 440 1.5GB overall. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 14400 (33%)

Texel Rate

The GeForce 8800 GT 512MB should be much (more or less 136%) more effective at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 19344 (136%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 440 1.5GB is superior to the GeForce 8800 GT 512MB, and very much so. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 4656 (49%)

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 information (counted in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends 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.