Asus M3A78-EH User Manual Page 48
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1-36 Chapter 1: Product introduction
9. 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 12 V Specication 2.0-compliant
power supply unit (PSU) with a minimum of 300 W 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, make sure
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 300 W. The system may become
unstable or may not boot up if the power is inadequate.
•
Do not forget to connect the 4-pin ATX +12 V 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. 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.
•
You must install a PSU with a higher power rating if you intend to install
additional devices.
R
M3A78-EH
M3A78-EH ATX Power Connector
EATXPWR
+3 Volts
+3 Volts
Ground
+5 Volts
+5 Volts
Ground
Ground
Power OK
+5V Standby
+12 Volts
-5 Volts
+5 Volts
+3 Volts
-12 Volts
Ground
Ground
Ground
PSON#
Ground
+5 Volts
+12 Volts
+3 Volts
+5 Volts
Ground
GND
+12V DC
GND
+12V DC
ATX12V
- Motherboard 1
- First Edition 2
- February 2008 2
- Contents 3
- Safety information 7
- About this guide 8
- Typography 9
- (continued on the next page) 10
- Product 13
- 1.1 Welcome! 14
- 1.3 Special features 14
- 1.2 Package contents 14
- HyperTransport 3.0 support 15
- DDR2 memory support 15
- 64-bit CPU support 15
- Gigabit LAN solution 17
- USB 2.0 technology 17
- 1.4 Before you proceed 19
- 1.5 Motherboard overview 20
- 1.5.2 Placement direction 21
- 1.5.3 Screw holes 21
- 1.6.1 Installing the CPU 22
- Gold triangle 23
- Small triangle 23
- Retention Module Base 24
- CPU Heatsink 24
- Retention bracket lock 24
- Retention bracket 24
- 1.7 System memory 26
- DDR2-800 MHz capability 28
- 1066 MHz capability 28
- DDR2-667MHz capability 29
- DDR-533MHz capability 31
- 1.7.3 Installing a DIMM 32
- 1.7.4 Removing a DIMM 32
- 1.8 Expansion slots 33
- Interrupt assignments 34
- 1.8.3 PCI slots 36
- 1.8.4 PCI Express x1 slot 36
- 1.8.5 PCI Express x16 slot 36
- Clear RTC 37
- (Default) 37
- M3A78-EH 38
- 1.10 Connectors 39
- Orient the red markings on 41
- NOTE: Orient the red markings 42
- (usually zigzag) on the ID 42
- Rotation 44
- ASUS M3A78-EH 1-33 45
- M3A78-EH USB 2.0 Connectors 45
- SPDIFOUT 46
- Legacy AC’97-compliant 47
- Azalia-compliant 47
- ASUS M3A78-EH 1-37 49
- System Panel Connector 49
- BIOS setup 51
- DOS environment 52
- XP environment 52
- 2.1.2 AFUDOS utility 53
- Updating the BIOS le 54
- ASUS M3A78-EH 2-5 55
- 2-6 Chapter 2: BIOS setup 56
- 2-8 Chapter 2: BIOS setup 58
- 2.1.5 ASUS Update utility 59
- 2-10 Chapter 2: BIOS setup 60
- ASUS M3A78-EH 2-11 61
- The ASUS Update utility is 61
- 2.2 BIOS setup program 62
- 2.2.1 BIOS menu screen 63
- 2.2.2 Menu bar 63
- 2.2.4 Menu items 64
- 2.2.5 Sub-menu items 64
- 2.2.6 Conguration elds 64
- 2.2.7 General help 64
- 2.2.3 Navigation keys 64
- 2.2.8 Pop-up window 65
- 2.3 Main menu 66
- Type [Auto] 67
- LBA/Large Mode [Auto] 67
- PIO Mode [Auto] 67
- 2.3.5 SATA 1-6 68
- 2.3.6 SATA Conguration 69
- 2.3.7 System Information 70
- 2.4 Advanced menu 71
- 2.4.3 CPU Conguration 72
- 2.4.4 Chipset 73
- Memory Conguration 74
- ECC Conguration 75
- Alternate VID [Auto] 76
- DRAM Timing Conguration 76
- Parallel Port IRQ [IRQ7] 77
- 2.4.6 PCIPnP 78
- 2.4.7 USB Conguration 79
- 2.5 Power menu 80
- 2.5.4 APM Conguration 81
- 2.5.5 Hardware Monitor 82
- 2.6 Boot menu 83
- 2.6.1 Boot Device Priority 84
- ASUS M3A78-EH 2-35 85
- 2.6.3 Security 86
- Change User Password 87
- Password Check [Setup] 87
- 2.7 Tools menu 88
- 2.8 Exit menu 89
- 2-40 Chapter 2: BIOS setup 90
- Software 91
- 3.2 Support DVD information 92
- 3.2.2 Drivers menu 93
- 3.2.3 Utilities menu 94
- 3.2.4 Make Disk menu 95
- 3.2.5 Manual menu 96
- 3.2.7 Other information 97
- Technical support Form 98
- Filelist 98
- Browse this DVD 98
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