I have an EVGA 660 Ti SuperClocked I got a few months ago. I clean my computer often to get rid of dust. I noticed that I haven't cleaned my GPU since I got it (it's shrouded of course... not sure of what to do). I see the 4 mounting screws on the PCB, but I don't know if there are any screw tension concerns, warranty concerns with taking off the shroud to clean and blow the dust out of the heatsinks and fan or what. I'm afraid I'll either screw it back on too tight and crush something or I'll void the warranty just trying to clean it out.