GeForce GT 440 3GB vs Radeon HD 4850 X2 1GB

Intro

Compare all of that to the Radeon HD 4850 X2 1GB, which makes use of a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 RAM works at a speed of 993 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon HD 4850 X2 1GB		250 Watts
	Difference: 194 Watts (346%)

Memory Bandwidth

The Radeon HD 4850 X2 1GB, in theory, should be much faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 83904 (194%)

Texel Rate

The Radeon HD 4850 X2 1GB is a lot (more or less 251%) better at AF than the GeForce GT 440 3GB. (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 35744 (251%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 X2 1GB is the winner, by a large margin. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
GeForce GT 440 3GB		14256 Mpixels/sec
	Difference: 5744 (40%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.