Ok here goes. I just got a new HD 5850 off that recent 1saleaday deal for 119.99. I was going to set up crossfire today but this happened http://www.techpowerup.com/forums/showthread.php?p=2480391#post2480391 I decided to test the new card and make sure all is well. Unfortunately all is not well. I tried furmark for starters and it quickly locked up the system with a grey screen and other artifacting. I tried a game of street fighter 4 ae and similar artifacting took place. Tried MSI Kombustor and well you get the picture. I decided to try running the fan at 100% and try playing the game and what do you know it works without issue. Tried Kombustor and it's working with the fan at full again. My question is can I find a fix myself? Maybe removing the cooler, cleaning the stock gunk and putting on some of my MX2, any suggestions are welcomed. I am in the Caribbean and to RMA this back to the US is going to be a hassle and very costly. I'm also wondering if the vendor would even let me return it as I have taken it out of the US. Thanks again for any suggestions.