GeForce 8800 GT 256MB vs GeForce GT 440 1.5GB

Intro

Compare all of that to the GeForce GT 440 1.5GB, which has a clock speed of 594 MHz and a GDDR3 memory frequency of 900 MHz. It also uses a 192-bit bus, and makes use of a 40 nm design. It is made up of 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 1.5GB		56 Watts
GeForce 8800 GT 256MB		105 Watts
	Difference: 49 Watts (88%)

Memory Bandwidth

In theory, the GeForce 8800 GT 256MB should be a bit faster than the GeForce GT 440 1.5GB overall. (explain)

GeForce 8800 GT 256MB		44800 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 1600 (4%)

Texel Rate

The GeForce 8800 GT 256MB should be a lot (about 136%) more effective at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

GeForce 8800 GT 256MB		33600 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 19344 (136%)

Pixel Rate

The GeForce GT 440 1.5GB will be much (approximately 49%) better at AA than the GeForce 8800 GT 256MB, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce 8800 GT 256MB		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 max amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.