Depending on the means you use to flash the BIOS it only takes a couple of minutes, and that depends on whether you backup your old BIOS or not. Award has a utility that does a nice job and is quick, BUT I must caution anyone who even thinks about flashing the BIOS to check, check again, and then check again and verify, make absolutely certain you have downloaded the correct .bin file before you undertake this operation. I can attest to the fact that you can make your motherboard totally useless and worthless by using the wrong flash update.