GeForce 8800 GT 512MB vs GeForce GT 440 1.5GB

Intro

Compare all of that to the GeForce GT 440 1.5GB, which has GPU clock speed of 594 MHz, and 1536 MB of GDDR3 RAM running at 900 MHz through a 192-bit bus. It also features 144 Stream Processors, 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 1.5GB		56 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 49 Watts (88%)

Memory Bandwidth

The GeForce 8800 GT 512MB, in theory, should be much faster 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 will be much (approximately 136%) better at AF 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

The GeForce GT 440 1.5GB should be much (more or less 49%) more effective at AA than the GeForce 8800 GT 512MB, and also will be able to handle higher resolutions more effectively. (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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a 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 - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.