howdy, Update: after several months of trouble free operation I get a call from Mrs. Howdy - after a bit of investigation I found the Swiftech pump had sprung a major leak drowning my WD 120GB hdd rendering it unuseable. So OUT WITH LC and back to HS/Fan. I can't say it hasn't been fun and a learning experience but for now I'll go back to convetional cooling means. BTW: all of the data on the F: drive seems to be recoverable by brut force means. M.R.