GeForce GT 440 1.5GB vs GeForce GTX 285 2GB

Intro

Compare all that to the GeForce GTX 285 2GB, which features a core clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also makes use of a 512-bit memory bus, and makes use of a 55 nm design. It features 240 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 148 Watts (264%)

Memory Bandwidth

Theoretically, the GeForce GTX 285 2GB should be much faster than the GeForce GT 440 1.5GB overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 115776 (268%)

Texel Rate

The GeForce GTX 285 2GB will be much (about 264%) faster with regards to texture filtering than the GeForce GT 440 1.5GB. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 37584 (264%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 285 2GB is superior to the GeForce GT 440 1.5GB, by a large margin. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 6480 (45%)

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 information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 max fill rate.