ASUS Z87-A User Manual

Page of 100
ASUS Z87-A
1-24
IRQ assignments for this motherboard
A
B
C
D
E
F
G
H
Intel PCH SATA 
controller #0
shared
Intel PCH SATA 
controller #1
shared
SMBUS Controller
shared
Thermal Controller
shared
XHCI
shared
EHCI #0
shared
EHCI #1
shared
PCIE x16_1
shared
PCIE x16_2
shared
PCIE x16_3
shared
PCIE x1_1
shared
PCIE x1_2
shared
PCI1
shared
PCI2
shared
Realtek 8111GR LAN
shared
ASMedia 1083
shared
1.6 
Onboard buttons
Onboard switches allow you to fine�tune performance when working on a bare or open�
case system. This is ideal for overclockers and gamers who continually change settings to 
enhance system performance.
1. 
MemOK! button
Installing DIMMs that are not compatible with the motherboard may cause system 
boot failure, and the DRAM_LED near the MemOK! switch lights continuously. Press 
and hold the MemOK! button until the DRAM_LED starts blinking to begin automatic 
memory compatibility tuning for successful boot.