just finnished them last night at 12:00 am havn't hooked them up yet, but i have put them on the card and thier getting pretty warm so id say that watercooling them will be about the best idea i had all year. there made from 1/2 copper end caps and pennies stuck together in pairs(piece of copper tube joins 2 of the blocks like this O-O). i'll post back after i'm done testing them out