No it's air cooled. a Zalman 7000alcu. the case is a lian li, which does help cool a system on it's own.
Idle temp is around 33'c if really pressed it gets to 52'c.
Running something like need 4 speed underground with e-mule downloading in the background the temp is 41/43'c
The case has 4 fans and if i have all turned on the temp drops by about 4 degrees. (i normaly use 3)
Just seen a setup similar to mine but with a vapour chill attached.
That beast was running at 4.4Ghz
The processor was cooled to -45'c
That's nearly as cold as the reception it get when i visit my X.