ASROCK Fatal1ty X99 Professional Serie Manual De Instrucciones página 34

LN2 Mode Switch
(LN2MODE)
(see p.1, No. 13)
Direct Key Button
(DIRKEY1)
(see p.1, No. 30)
30
The LN2 mode aids in
eliminating the cold-boot bug
issues in processors during
extreme overclocking with
Liquid Nitrogen.
Direct Key Button allows
users to turn on the system
and directly enter the UEFI
setup screen.