1.9
Jumpers
Clear RTC RAM (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.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5~10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the
<Del>
key during the boot process and enter BIOS setup to reenter
data.
M4A88T-V EVO/USB3
M4A88T-V EVO/USB3 Clear RTC RAM
1 2
2 3
Normal
(Default)
Clear RTC
CLRTC
• In single VGA card mode, use first the PCIe 2.0 x16_1 slot (blue) for a PCI Express x16
graphics card to get better performance.
• For M4A88T-V EVO/USB3, the PCIe x1 slot shares the bandwidth with the PCIe x16_2
slot. Due to the CrossFireX™ limitation, DO NOT use the PCIe x1 slot when you install
two CrossFireX™ graphics cards on both the PCIe x16 slots to set up a CrossFireX™
configuration. To disable the PCIe X1 slot, refer to the
NorthBridge Configuration
section in the BIOS for details.
• We recommend that you provide sufficient power when running CrossFireX™ mode.
See page 1-25 for details.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN 1/2 when using
multiple graphics cards for better thermal environment. See page 1-24 for details.
VGA configuration
PCI Express operating mode
PCIe x16_1
PCIe x16_2
Single VGA/PCIe card
x16 (Recommended for single VGA card) N/A
Dual VGA/PCIe card
x16
x4
Chapter 1: Product introduction
1-20
