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ASUS B85M-G
1-11
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
• If the steps above do not help, remove the onboard battery and move the jumper
again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the
battery.
• You do not need to clear the RTC when the system hangs due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature.
Shut down and reboot the system, then the BIOS automatically resets parameter
settings to default values.
2. Keyboard and USB device wake-up (KB_USBPWB)
Set this jumper to +5V to wake up the computer from S1 sleep mode (CPU stopped,
DRAM refreshed, system running in low power mode) using the connected USB
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,
DRAM in slow refresh, power supply in reduced power mode).
B85M-G
+5V +5VSB
(Default)
KB_USBPWB
B85M-G Keyboard and USB device wake up
1 2
2 3
• The USB device wake-up feature requires a power supply that can provide 500mA on
the +5VSB lead for each USB port; otherwise, the system would not power up.
• The total current consumed must NOT exceed the power supply capability (+5VSB)
whether under normal condition or in sleep mode.
3. USB device wake-up (USBPWF)
This jumper allows you to enable or disable the USB device wake-up feature. When
you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a
key on the USB keyboard or by clicking on the USB mouse. This feature requires an
ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding
setting in the BIOS.
B85M-G
21
2 3
+5V
(Default)
+5VSB
USBPWF
B85M-G USB device wake up