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

Intro

Compare those specifications to the Radeon HD 4850 X2 512MB, which comes with core clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs along with 40 TAUs 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 512MB		250 Watts
	Difference: 194 Watts (346%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 512MB should be a lot 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 (approximately 251%) faster with regards to anisotropic filtering 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

The Radeon HD 4850 X2 512MB should be quite a bit (about 40%) faster with regards to AA than the GeForce GT 440 3GB, and will be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.