GeForce GT 440 1.5GB vs GeForce GTX 275

Intro

Compare those specs to the GeForce GTX 275, which comes with a clock speed of 633 MHz and a GDDR3 memory speed of 1134 MHz. It also features a 448-bit bus, and uses a 55 nm design. It features 240 SPUs, 80 Texture Address Units, and 28 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce GTX 275		219 Watts
	Difference: 163 Watts (291%)

Memory Bandwidth

In theory, the GeForce GTX 275 is 194% faster than the GeForce GT 440 1.5GB overall, due to its greater bandwidth. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 83808 (194%)

Texel Rate

The GeForce GTX 275 is quite a bit (approximately 255%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 36384 (255%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is a better choice, by a large margin. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 3468 (24%)

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 (in units of MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.