dont know of any guides, but make sure ur agp/pci bus is locked in your bios. and move up your HHT slowely, a max of 5mhz at a time. the best 2 heatsinks at the moment are the thermalright xp120 or the zalman 7700Cu. depending if its a winchester or newcastle core they max out at around 2.8 and 2.7ish respectively. but i like mine abit safer and about 2.4 to 2.6 should be fine, but it varies from chip to chip, uve just gotta get lucky.