Wikipedia
The xDNA technology is a technology designed by Diamond Multimedia, allowing motherboards which are not certified for ATI CrossFire (for instance, nForce 500/600 series motherboards designed by NVIDIA) to install multiple ATI Radeon video cards (up to four) as a CrossFire setup and operate in rendering modes which are exclusively made for CrossFire setups. Diamond Multimedia will provide optimized Catalyst Drivers and middleware for the platform in a single package.
xDNA is a modified form of DNA with 8 nucleobases: the four natural bases A, C, G, and T, and four artificial modifications of these made longer by the addition of an extra benzene ring: xA, xC, xG, and xT. A pairs with xT, C pairs with xG, G pairs with xC, and T pairs with xA, so the distance between the two halves of the double helix is consistently greater. The double helix is thus wider and has a longer pitch.
Experiments with xDNA are expected to provide new insight into the behavior of natural DNA. Also, the extended bases xA, xC, xG, and xT are fluorescent, and single strands composed of only extended bases can recognize and bind to single strands of natural DNA, which could make them useful tools for studying biological systems. The same research group also constructed widened DNA, called yDNA. xDNA is more stable when compared to regular DNA when subjected to higher temperature. xDNA is not capable of integrating into endogenous DNA and therefore must form its own distinct molecular helix.
Chemical structure of dxA
Chemical structure of dxT
Chemical structure of dxC
Chemical structure of dxG
Adenine
Thymine
Cytosine
Guanine
modified nucleobase dxA.svg
modified nucleobase dxT.svg
modified nucleobase dxC.svg
modified nucleobase dxG.svg
Size-expanded xA
Size-expanded xT
Size-expanded xC
Size-expanded xG