MSI 745 ULTRA User Guide - Page 41
Jumpers - ram
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Hardware Setup Jumpers The motherboard provides one jumper for you to set the computers function. This section will explain how to change your motherboards function through the use of the jumper. Clear CMOS Jumper: JBAT1 There is a CMOS RAM on board that has a power supply from external battery to keep the data of system configuration. With the CMOS RAM, the system can automatically boot OS every time it is turned on. That battery has long life time for at least 5 years. If you want to clear the system configuration, use the JBAT1 (Clear CMOS Jumper ) to clear data. Follow the instructions below to clear the data: 1 JBAT1 1 3 Keep CMOS 1 3 Clear CMOS You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position. Avoid WARNING! clearing the CMOS while the system is on; it will damage the mainboard. 2-23