MSI 945GCM5-F V2 User Guide - Page 14

Clear CMOS Jumper: JBAT1 There is a CMOS RAM onboard that has a power supply from an external battery to keep the data of system configuration. With the CMOS RAM, the system can 1 2 3 automatically boot OS every time it is turned on. If you want to clear the system configuration, set the jumper to clear data. 1 2 3 Keep Data 1 2 3 Clear Data Important: You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will damage the mainboard. PCI (Peripheral Component Interconnect) Express Slot The PCI Express slot supports the PCI Express interface expansion card. The PCI Express x 16 supports up to 4.0 GB/s transfer rate. The PCI Express x 1 supports up to 250 MB/s transfer rate. PCI (Peripheral Component Interconnect) Slot The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that comply with PCI specifications. Important: When adding or removing expansion cards, make sure that you unplug the power supply first. Meanwhile, read the documentation for the expansion card to configure any necessary hardware or software settings for the expansion card, such as jumpers, switches or BIOS configuration. PCI Interrupt Request Routing The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus pins as follows: PCI Slot1 PCI Slot2 Order1 INT B# INT C# Order2 INT C# INT D# Order3 INT D# INT A# Order4 INT A# INT B# 8