I just got a Duron 750, and it's POSTing at 7.5X133, but I get windows errors. I could probably get this thing running properly with my current cooling, but I want more. I want to put together a water cooling system, but have a lot of questions. How much does a Duron @ over 1GHz need? For future proofing, how much would say a tbird at 1.5GHz need? Would a large radiator with two 120mm fans be overkill? Would a small radiator with one 120mm fan be fine?