FM2+ Mobo mATX please



i see 4.7 of 5. made by Asus
ASUS DIGI+ VRM - 3 + 2 Phase digital power design
 


will i need to flash the BIOS?
or will it run the 7850k out of box
and if not will it be stable enough to flash it?
also i need it to run 2400mhz ram
 


Might ask them
https://vip.asus.com/VIP2/Services/QuestionForm/TechQuery
 


so i can just drop 2400 in?
or will it down to 2133 and i can bring it back too 2400?