The first BIOS for that board is revision 0503 and the one that you need for the 4170 (and most of the other FX CPU's) IS a newer BIOS than that, BUT, I would imagine that since you JUST bought the board, it'll already have the BIOS that you need on it (AND it should even have the newest BIOS, revision 1208 because that BIOS was released in May. The BIOS that you need was released in December of last year, BTW).
Bottom line, I think you'll be just fine (no need to update the BIOS).
Ah, Ok. Well then that's good to hear. Though if I I do have any problems I'll let you guys know. Thanks for the quick reply!