My personal 4 socket water-cooled server.
4x AMD Opteron 6380 2.8Ghz, 16Cores (Turbo mode) on Supermocro H8QG6-i
64 cores in total with 180 Ghz
Here is some video http://vimeo.com/83923217
I was looking for a case capable to bear supermicro H8QG6-i motherboard, because Supermicro's chassis that they sell for those boards are ugly and it was difficult to plan to use it in watercolled system. So I've stopped my choice on a Coolermaster's Cosmos II case. It is the biggest one I found with a convinient price of about 300 euros. In addition it's very handy for transportation.
All water-cooling components qre from Aquacomputer and EK.
2x 360mm radiators + 1x 240 radiator from Aquacomputer
880 ml reservoir and Fan controller Aquaero XT from Aquacomputer
4x waterblocks cuplex kryos Delrin für Socket G34 - from aquacomputer
All fitting parts and pump EK-DDC 3.25 X-TOP CSQ - Plexi from EK
Fun grill from MPCTECH.
It had a maximum of 63C during 24hours rendering at 100% CPU load.
So, 63C on first CPU and 61-62C on the second, third and 4th.
Liquid's temp was about 33-35C.
I conceived the loop that the liquid pass through CPU1 and CPU3, than it goes in to reservoir and bottom radiator, than into CPU2 and CPU4, than into the middle radiator and top radiator before return again in the CPU1 waterblock.
I'm putty happy with this results.