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Asus M5A87 User Manual

Asus M5A87
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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.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
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.
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 so the BIOS can automatically reset parameter settings to
default values.
M5A87
M5A87 Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC
ASUS M5A87 1-19

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Asus M5A87 Specifications

General IconGeneral
ECCYes
Number of memory slots4
Supported memory typesDDR3-SDRAM
Maximum internal memory16 GB
Supported memory clock speeds1066, 1333, 1600, 2000 MHz
System bus rate5.2 GT/s
Processor socketSocket AM3
Processor manufacturerAMD
Compatible processor seriesAMD Phenom II X2, AMD Phenom II X3, AMD Phenom II X4, AMD Phenom II X6, AMD Phenom II X8
Number of SATA II connectors6
Number of Parallel ATA connectors0
Headphone outputs3
USB 2.0 ports quantityUSB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Audio chipRealtek ALC887
Component forPC
Motherboard chipsetAMD 870 (RX881)
Audio output channels7.1 channels
Motherboard form factorATX
RAID levels0, 1, 5, 10, JBOD
Supported storage drive interfacesSATA III
On-board graphics card-
Parallel processing technology supportNot supported
PCI Express slots version2.0
Controller interface typeAMD SB850
LAN controllerRealtek RTL8111E
Networking featuresGigabit Ethernet
Ethernet interface typeFast Ethernet, Gigabit Ethernet
BIOS typeAMI
ACPI version2.0a
BIOS memory size16 Mbit
Weight and Dimensions IconWeight and Dimensions
Depth213 mm
Width305 mm

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