if it's stable then it shouldn't be a big problem. I'm guessing your using the fan that came with your 1900+ Try a copper based fan with some artic silver. Also try and get a fan or 2 in your system to move some air around. Right now my 1900+ is at 53* fully loaded which is a large improvement than what it use to be (almost pushing 61) Anyway your probably not going to cool your chip without spending some $$$.