alot of people are flashing the bios becuase they have an LE board, flashing to a retail bios will set the clocks to Retail specs ie:275/275 without them having to use a utility to do so.. however some find issues caused by the voltage being set to low on their card and they end up with artifacts.. The only other advantage of flashing is if there was something wrong with the original, a bug or flaw that when corrected would make your card run more stable..