GeForce 8800 GT 1GB vs GeForce GT 440 3GB

Intro

Compare that to the GeForce GT 440 3GB, which has a clock frequency of 594 MHz and a GDDR3 memory frequency of 900 MHz. It also features a 192-bit memory bus, and makes use of a 40 nm design. It features 144 SPUs, 24 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce 8800 GT 1GB		105 Watts
	Difference: 49 Watts (88%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GT 1GB should theoretically be quite a bit superior to the GeForce GT 440 3GB overall. (explain)

GeForce 8800 GT 1GB		57600 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 14400 (33%)

Texel Rate

The GeForce 8800 GT 1GB should be much (approximately 136%) better at texture filtering than the GeForce GT 440 3GB. (explain)

GeForce 8800 GT 1GB		33600 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 19344 (136%)

Pixel Rate

The GeForce GT 440 3GB will be much (about 49%) more effective at FSAA than the GeForce 8800 GT 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
GeForce 8800 GT 1GB		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 maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.