Running fanless isn't as difficult as it sounds, I've always used a radbox, and have had everything watercooled ( including PSU ) in the past, and if your processor is relativly low powered, a heatercore with no fan should be fine.
I was running a 1600XP @ stock, with a JCB heatercore under my desk, and it was hitting 50 degrees at load, but I dropped the volts to under stock, and it topped out at 47, which was fine and stable for a long time.
The only problem I had was the PSU, I didn't do a great job of watercooling it, and it was getting very very hot, still worked for several months, but I got nervous and put a 5v fan back in it, just in case.
Just try it, and see what happens, if your system is still stable, then its fine, although it will run very hot.
I'm planning something like this as my next project, I can't lug my huge radbox to and from University next year, so I've got hold of a 4U server case, and I'm going to mount a chevvy core on each side, and have a 1048 Eheim mounted internally, and build an integrated copper HDD cage, with pipe running over it, and an integrated watercooled PSU, done like this one
http://www.digital-explosion.co.uk/i...p?articleID=65
( before, I bolted a waterblock to the top of the heatsinks that were already in the PSU, rather than replacing them like this one )
Good luck to you anyway
