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Asus M4A77T User Manual

Asus M4A77T
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The DRAM_LED also lights when the DIMM is not properly installed. Turn off the system
and reinstall the DIMM before using the MemOK! function.
Press the MemOK! switch under Windows® OS environment will reboot the computer
and start memory tuning.
During the tuning process, the system loads and tests failsafe memory settings. It takes
about 30 seconds for the system to test one set of failsafe settings. If the test fails,
the system reboots and test the next set of failsafe settings. The blinking speed of the
DRAM_LED increases, indicating different test processes.
If the installed DIMMs still fail to boot after the whole tuning process, the DRAM_LED
lights continuously. Replace the DIMMs with ones recommended in the Memory QVL
(Qualied Vendors Lists) in this user manual or on the ASUS website at
www.asus.com.
If you turn off the computer and replace DIMMs during the tuning process, the system
continues memory tuning after turning on the computer. To stop memory tuning, turn off
the computer and unplug the power cord for about 5–10 seconds.
If your system fail to boot due to BIOS overclocking, press the MemOK! switch to boot
and load BIOS default settings. A messgae will appear during POST reminding you that
the BIOS has been restored to its default settings.
We recommend that you download and update to the latest BIOS version from the
ASUS website at www.asus.com after using the MemOK! function.
1.10 MemOK! switch
Onboard switch allows you to ne-tune performance when working on a bare or open-
case system. This is ideal for overclockers and gamers who continually change settings to
enhance system performance.
MemOK! switch
Installing DIMMs that are incompatible with the motherboard may cause system boot failure,
and the DRAM_LED near the MemOK! switch lights continuously. Press and hold the
MemOK! switch until the DRAM_LED starts blinking to begin automatic memory compatibility
tuning for successful boot.
Chapter 1: Product introduction1-18

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Asus M4A77T Specifications

General IconGeneral
ECCYes
Number of memory slots4
Maximum internal memory16 GB
Processor socketSocket AM3
Processor manufacturerAMD
Maximum number of SMP processors1
Number of SATA connectors6
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.
Firewire (IEEE 1394) ports0
Motherboard chipsetAMD 770
Motherboard form factorATX
PCI Express x1 slots2
Controller 2nd interface typeIDE/SATA
LAN controllerRealtek RTL8112L
ACPI version2.0
BIOS memory size64 Mbit
Weight and Dimensions IconWeight and Dimensions
Depth213 mm
Width305 mm

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