It is not advised to update your BIOS unless there is a reason you need to do it, and the new BIOS revision specifically says the update is written to fix your particular problem.
The best advice about your BIOS, just as already mentioned here by others, If it ain't broke, don't try to fix it. There is nothing in your BIOS that works like a driver. It will have no effect on your system performance, your BIOS merely sets the basic parameters your hardware needs to function, and its simply a case of it either works, or it does not.
Also we might add that if you mess up the flash process, or you flash the wrong version, you can instantly render your motherboard dead, with no recourse but return it to the manufacture to have the BIOS fixed, or buy a new motherboard.