Replace the stock cooler if all else. Sometimes cards like this pop up that no matter what one does to try to fix them using the stock cooler nothing ever works. New cooler such as the zalman vf1000 but it is expensive but it is one of the few that I own and use my self. There are others out there but it may very well be worth the shot. As for the 450 its junk and the 250 with a new cooler can be fixed. Is the cooler level with the core?
Yes it level with it.. I Cant afford a new cooler and as for the GTS 450 it has a slight performance increase and DX11 Support. It is better than the GTS 250 as far as i know, I Was going to call up EVGA And see if they would take it, but I Made the mistake of registering it on the EVGA Website saying i bought it from eBay so Since EVGA Doesnt (Usually) RMA Stuff bought second hand im screwed.