Details are few, but from what I can tell, it is a full-coverage block made of full copper. For those of you that know nothing about water cooling or computers, a water block is used to cool the parts on the video card that are normally cooled by air and heat sinks. Water, or other cooling substances, run over the copper block, transferring heat off the card and away with the water, which is then re-cooled in a radiator. Anyway, this DD prototype looks pretty sweet, and I can’t wait to try one out, myself. The last block I tried to use kinda bricked my card and voided my warranty.
More pics after the jump