GeForce GT 440 3GB vs Radeon HD 4850 X2 512MB

Intro

Compare those specifications to the Radeon HD 4850 X2 512MB, which has a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 memory set to run at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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 512MB		250 Watts
	Difference: 194 Watts (346%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 512MB should be quite a bit faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4850 X2 512MB		127104 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 83904 (194%)

Texel Rate

The Radeon HD 4850 X2 512MB will be quite a bit (about 251%) faster with regards to AF than the GeForce GT 440 3GB. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 35744 (251%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4850 X2 512MB is superior to the GeForce GT 440 3GB, and very much so. (explain)

Radeon HD 4850 X2 512MB		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: Bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.