Asus M4A78LT-M User Manual Page 33
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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 t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.
•
We recommend that you use an ATX 12V Specication 2.0-compliant power supply unit
(PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power
plugs.
•
If you intend to use a PSU with 20-pin and 4-pin power plugs, ensure that the 20-pin
power plug can provide at least 15 A on +12 V and that the PSU has a minimum power
rating of 300W. The system may become unstable or may not boot up if the power is
inadequate.
•
DO NOT forget to connect the 4-pin ATX12V power plug. Otherwise, the system will not
boot up.
• We recommend that you use a PSU with higher power output when conguring a
system with more power-consuming devices or when you intend to install additional
devices. The system may become unstable or may not boot up if the power is
inadequate.
•
If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
M4A78LT-M
M4A78LT-M ATX power connectors
EATXPWR
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
ATX12V
PIN 1
+12V DC
+12V DC
GND
GND
ASUS M4A78LT-M 1-23
- Motherboard 1
- First Edition V1 2
- December 2009 2
- Contents 3
- Safety information 7
- About this guide 7
- Where to nd more information 8
- Typography 8
- (continued on the next page) 9
- Chapter 1 11
- Vista or later version OS 12
- ASUS EPU 14
- ASUS AI NET2 14
- C.P.R. (CPU Parameter Recall) 14
- Green ASUS 14
- M4A78LT-M 15
- 1.5.4 Layout contents 17
- 1.5.3 Motherboard layout 17
- CPU Heatsink 20
- Retention bracket 20
- Retention bracket lock 20
- Retention Module Base 20
- 1.7.2 Memory congurations 22
- DDR3-1333 MHz capability 23
- DDR3-1600(O.C.)MHz capability 23
- DDR3-1333MHz capability 24
- DDR3-1066MHz capability 25
- 1.7.3 Installing a DIMM 26
- 1.7.4 Removing a DIMM 26
- 1.8 Expansion slots 27
- 1.10 Connectors 29
- ASUS M4A78LT-M 1-21 31
- M4A78LT-M USB2.0 connectors 37
- 1.11 Software support 40
- Chapter 2 41
- 42
- Recovering the BIOS 43
- 2.2 BIOS setup program 44
- 2.2.1 BIOS menu screen 45
- 2.2.2 Menu bar 45
- 2.2.3 Navigation keys 45
- Options 46
- Disabled 46
- 2.3 Main menu 47
- 2.3.4 SATA Conguration 48
- 2.4 Advanced menu 49
- CPU/NB Frequency [Auto] 50
- CPU Over Voltage [Auto] 50
- GPU Overclocking [Auto] 50
- PCIE Overclocking [Auto] 50
- Memclock Value [400MHz] 51
- 2.4.2 CPU Conguration 52
- 2.4.3 Chipset 52
- ECC Conguration 53
- Internal Graphics 53
- Internal Graphics Mode [UMA] 53
- Surround View [Auto] 53
- 2.4.5 PCIPnP 54
- 2.4.6 USB Conguration 55
- 2.5 Power menu 56
- 2.6 Boot menu 58
- 2.6.3 Security 59
- Change User Password 60
- Clear User Password 60
- Password Check [Setup] 60
- 2.7 Tools menu 61
- 2.8 Exit menu 63
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