I have the same board and cpu.Yes,you need to flash bios to F7.Some people say you can install cpu,and then flash,but why take a chance of potential problems.Q-flash is easy to use.Flashed (2) 970's using version 1.2 ,with no issues.I love this cpu's for gaming and heavy tasks.I had this oc @ 4.5g with 1.4v,and it passed prime 95 for a few hours,but my temps increased 5-7c.Max load was 50-52C,which is more than acceptable oc ,but the temp increase is not worth pushing this another 100 MHz for the trade off in temps.At 4.4g this cpu is lighting fast, maintaining low temps.
MOBO >GA-970A-UD3CPU > FX6300 @ 4.4g w 1.35v 18c-46C