GeForce GT 440 1.5GB vs Radeon HD 4850 X2 512MB

Intro

Compare all that to the Radeon HD 4850 X2 512MB, which has a core clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		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 1.5GB in general. (explain)

Radeon HD 4850 X2 512MB		127104 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 83904 (194%)

Texel Rate

The Radeon HD 4850 X2 512MB will be much (approximately 251%) faster with regards to AF than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 35744 (251%)

Pixel Rate

The Radeon HD 4850 X2 512MB is a lot (about 40%) better at full screen anti-aliasing than the GeForce GT 440 1.5GB, and will be capable of handling higher resolutions better. (explain)

Radeon HD 4850 X2 512MB		20000 Mpixels/sec
GeForce GT 440 1.5GB		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 (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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