Depends on the loop and how serious you want to be. PM me, I have the remains of my old loop so I might be able to work ya a steal... er, .... deal.
not bad, but you can get better temps with a real loop and block. My old loop was laughed at by many people, but my temps on a 980x at 4.5GHz never topped 70C. I think I still may have a 1366 block or two laying around.
Pull the NB sink, put quality paste on it and put a fan on there.