i7Baby :
Have a look at the bios update descriptions on the mobo website.
drkatz42 :
Asus indicates support since bios update 2001.
Haswell Refresh CPUs support - Yes a BIOS update might be required prior for *Lynx Point chipsets to installing these CPUs.
*Lynx Point chipsets are H81, B85, Q85, Q87, H87 & Z87.