Asus M4A78LT_LE Owner's Manual

MotherboardM4A78LTM4A78LT LE

xM4A78LT Series specications summary* Specications are subject to change without notice. Back panel I/O ports1 x LPT port 1 x PS/2 Keyboard port 1

1.2 Package contentsCheck your motherboard package for the following items.Motherboard ASUS M4A78LT Series motherboardCables 2 x Serial ATA cablesA

AMD® Cool ‘n’ Quiet TechnologyThis motherboard supports the AMD® Cool ‘n’ Quiet technology which monitors system operation and automatically adjusts C

1.3.2 Innovative ASUS featuresCore UnlockerASUS Core Unlocker simplies the activation of a latent AMD® CPU-with just pressing a key. Enjoy an instan

C.P.R. (CPU Parameter Recall)The BIOS C.P.R. feature automatically restores the CPU default settings when the system hangs due to overclocking failure

1.4 Before you proceedTake note of the following precautions before you install motherboard components or change any motherboard settings.• Unplug t

M4A78LT Series1.5 Motherboard overview1.5.1 Placement directionWhen installing the motherboard, ensure that you place it into the chassis in the cor

1.5.3 Motherboard layoutM4A78LT SeriesPCIEX16_1PCIEX1_1PCIEX1_2PCI1PCI2PCI3PRI_IDEUSB56 USB78 USB910AAFPEATXPWRCPU_FANLithium CellCMOS PowerSuperI/OI

1.5.4 Layout contents1.6 Central Processing Unit (CPU)This motherboard comes with an AM3 socket designed for Phenom™ II / Athlon™ II / Sempron™ 100

5. When the CPU is in place, push down the socket lever to secure the CPU. The lever clicks on the side tab to indicate that it is locked.6. Install

iiE6331First Edition (V1) January 2011Copyright © 2011 ASUSTeK Computer Inc. All Rights Reserved.No part of this manual, including the products and so

1.6.2 Installing the heatsink and fanEnsure that you use only AMD-certied heatsink and fan assembly.To install the CPU heatsink and fan:1. Place th

M4A78LT SeriesM4A78LT Series 240-pin DDR3 DIMM socketsDIMM_A1DIMM_A2DIMM_B1DIMM_B23. Align the other end of the retention bracket to the retention mo

1.7.2 Memory congurationsYou may install 512MB, 1GB, 2GB, and 4GB unbuffered non-ECC DDR3 DIMMs into the DIMM sockets.• You may install varying mem

DDR3-1600(O.C.)MHz capabilityVendor Part No. Size SS/DSChip BrandChip NO.CL Voltage DIMM supportA* B* C*OCZ OCZ3P18004GK 4GB(2 x 2GB) DS - - 8-8-8-27

DDR3-1333MHz capabilityVendor Part No. Size SS/ DSChip BrandChip NO.CL Voltage DIMM supportA* B* C*A-Data AD31333001GOU 1GB SS A-Data AD30908C8D-151C

Vendor Part No. Size SS/ DSChip BrandChip NO.CL Voltage DIMM supportA* B* C*OCZ OCZ3P1333LV6GK 6GB(3 x 2GB) DS - - 7-7-7-20 1.65V • • •OCZ OCZ3X1333LV

DDR3-1066MHz capabilitySS: Single-sided / DS: Double-sided DIMM support: • A*: Supports one module inserted into any slot as single-channel memory co

1.7.3 Installing a DIMMUnplug the power supply before adding or removing DIMMs or other system components. Failure to do so can cause severe damage t

1.8 Expansion slotsIn the future, you may need to install expansion cards. The following sub-sections describe the slots and the expansion cards that

1.9 Jumpers1. 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, ti

iiiContentsNotices ... viSafety information ...

2. USB device wake-up (3-pin USBPW1-4, USBPW5-10)Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, sy

1.10 Connectors1.10.1 Rear panel ports1. PS/2 Mouse port (green). This port is for a PS/2 mouse.2. Parallel port. This 25-pin port connects a para

7. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect to USB 2.0 devices.8. USB 2.0 ports 3 and 4. These two 4-pin Univ

2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)These connectors are for an ATX power supply. The plugs from the power supply are designed to 

3. IDE connector (40-1 pin PRI_IDE)The onboard IDE connector is for Ultra DMA 133/100/66 signal cable. There are three connectors on each Ultra DMA 1

4. Serial ATA connectors (7-pin SATA1, SATA2, SATA3, SATA4, SATA5, and SATA6)These connectors are for the Serial ATA signal cables for Serial ATA 3Gb

5. System panel connector (20-8 pin PANEL)This connector supports several chassis-mounted functions.PIN 1* Requires an ATX power supplyPLED SPEAKERPL

6. USB connectors (10-1 pin USB56, USB78, USB910)These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, the

8. CPU and chassis fan connectors (4-pin CPU_FAN and 3-pin CHA_FAN)Connect the fan cables to the fan connectors on the motherboard, ensuring that the

1.11 Software support1.11.1 Installing an operating systemThis motherboard supports Windows® XP / Vista / 7 Operating Systems (OS). Always install t

ivContents1.11 Software support ... 1-291.11.1 Installing an operating system .

Chapter 1: Product introduction1-30

ASUS M4A78LT Series 2-1Chapter 2BIOS information2.1 Managing and updating your BIOSSave a copy of the original motherboard BIOS le to a USB ash dis

2-2 Chapter 2: BIOS informationASUSTek EZ Flash 2 BIOS ROM Utility V3.44Current ROMUpdate ROMC:NoteFLASH TYPE: EON 25P/F80PATH: C:\ BOARD: M4A78LTVE

ASUS M4A78LT Series 2-3• This function supports USB ash disks with FAT 32/16 format and single partition only.• DO NOT shut down or reset the syste

2-4 Chapter 2: BIOS information2.2 BIOS setup programUse the BIOS Setup program to update the BIOS or congure its parameters. The BIOS screens inclu

ASUS M4A78LT Series 2-52.2.1 BIOS menu screen2.2.2 Menu barThe menu bar on top of the screen has the following main items:Main For changing the

2-6 Chapter 2: BIOS information2.2.4 Menu itemsThe highlighted item on the menu bar displays the specic items for that menu. For example, selecting

ASUS M4A78LT Series 2-72.3 Main menuWhen you enter the BIOS Setup program, the Main menu screen appears, giving you an overview of the basic system i

2-8 Chapter 2: BIOS informationLBA/Large Mode [Auto]Enables or disables the LBA mode. Setting this item to [Auto] enables the LBA mode if the device s

ASUS M4A78LT Series 2-92.4.1 JumperFree Conguration2.4 Advanced menuThe Advanced menu items allow you to change the settings for the CPU and other

v2.5.5 HW Monitor Conguration ... 2-182.5.6 Anti Surge Support [Enabled] ...

2-10 Chapter 2: BIOS informationProcessor Frequency Multiplier [Auto]Sets the processor frequency multiplier. Conguration options: [Auto] [x4.0 800MH

ASUS M4A78LT Series 2-11If the system becomes unstable after changing the setting, set it back to [Auto] for safe mode.LoadLine Calibration [Auto]Sets

2-12 Chapter 2: BIOS informationDRAM Row Cycle Time [Auto]Conguration options: [Auto] [11 CLK] – [41 CLK]DRAM WRITE Recovery Time [Auto]Conguration

ASUS M4A78LT Series 2-132.4.3 ChipsetNorthBridge CongurationDRAM Controller CongurationBank Interleaving [Auto]Allows you to enable the bank memory

2-14 Chapter 2: BIOS informationECC CongurationECC Mode [Disabled]Enables or disables the DRAM ECC that allows the hardware to report and correct mem

ASUS M4A78LT Series 2-152.4.4 Onboard Device CongurationSerial Port1 Address [3F8/IRQ4]Allows you to select the Serial Port1 base address. Congura

2-16 Chapter 2: BIOS information2.4.6 USB CongurationThe items in this menu allows you to change the USB-related features. Select an item then press

ASUS M4A78LT Series 2-172.5 Power menuThe Power menu items allow you to change the settings for the Advanced Conguration and Power Interface (ACPI)

2-18 Chapter 2: BIOS informationPower on By PS/2 Keyboard [Disabled]Enables or disables PS/2 Keyboard to generate a wake event. Conguration options:

ASUS M4A78LT Series 2-192.6 Boot menuThe Boot menu items allow you to change the system boot options. Select an item then press <Enter> to disp

viNoticesFederal Communications Commission StatementThis device complies with Part 15 of the FCC Rules. Operation is subject to the following two cond

2-20 Chapter 2: BIOS informationBootup Num-Lock [On]Selects the power-on state for the NumLock. Conguration options: [Off] [On]Wait for ‘F1’ If Error

ASUS M4A78LT Series 2-212.7 Tools menuThe Tools menu items allow you to congure options for special functions. Select an item then press <Enter&g

2-22 Chapter 2: BIOS information2.7.2 ASUS O.C. ProleThis item allows you to store or load multiple BIOS settings.Add Your CMOS ProleAllows you to

ASUS M4A78LT Series 2-23Exit & Save ChangesOnce you are nished making your selections, choose this option from the Exit menu to ensure the values

2-24 Chapter 2: BIOS information

ASUS contact informationASUSTeK COMPUTER INC.Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259Telephone +886-2-2894-3447Fax +886-2-2890-

EC Declaration of Conformity We, the undersigned, Manufacturer: ASUSTek COMPUTER INC. Address, City: No. 150, LI-TE RD., PEITOU, TAIPEI 112, TAIWAN R.

viiSafety informationElectrical safety• To prevent electric shock hazard, disconnect the power cable from the electric outlet before relocating the s

viiiConventions used in this guideTo ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual.

ixM4A78LT Series specications summar(continued on the next page)CPU AMD® Socket AM3 AMD® Phenom™ II / Athlon™ II / Sempron™ 100 series processors