1.5.3PCI Express 2.0 x1 slots
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications.
1.5.4PCI Express x16 slot
This motherboard has a PCI Express x16 slot that supports PCI Express x16 graphic cards complying with the PCI Express specifications.
1.5.3PCI slots
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that comply with PCI specifications.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
LAN | – | – | shared | – | – | – | – | – |
PCIE x16_1 | shared | – | – | – | – | – | – | – |
PCIE x1_1 | – | – | shared | – | – | – | – | – |
PCIE x1_2 | – | – | – | shared | – | – | – | – |
PCIE x1_3 | shared | – | – | – | – | – | – | – |
Intel PCH SATA Controller | – | – | – | shared | – | – | – | – |
HD Audio | – | – | – | – | – | – | shared | – |
USB2.0_1 | – | – | – | – | – | – | – | shared |
USB2.0_2 | – | – | – | – | shared | – | – | – |
USB3.0 | – | – | – | – | – | shared | – | – |
1.6Jumpers
1.Clear RTC RAM (3-pin CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords.
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| CLRTC |
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1 | 2 | 2 | 3 | |
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| Normal | Clear RTC | ||
| (Default) |
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H81M-C Clear RTC RAM
To erase the RTC RAM:
1.Turn OFF the computer and unplug the power cord.
Chapter 1: Product introduction |