Asus M5A78L/USB3 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.
M5A78L/USB3
M5A78L/USB3 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 M5A78L/USB3 1-23
- Motherboard 1
- Second Edition (V2) 2
- January 2013 2
- Contents 3
- Safety information 7
- About this guide 8
- (continued on the next page) 9
- Chapter 1 11
- ASUS M5A78L/USB3 1-3 13
- C.P.R. (CPU Parameter Recall) 14
- ErP ready 14
- 1.4 Before you proceed 15
- M5A78L/USB3 16
- 1.5.3 Motherboard layout 17
- 1.6.1 Installing the CPU 18
- 1.5.4 Layout contents 18
- CPU FAN PWR 19
- CPU FAN IN 19
- CPU FAN PWM 19
- CPU Heatsink 20
- Retention bracket 20
- Retention bracket lock 20
- Retention Module Base 20
- Channel Sockets 21
- Channel A DIMM_A1 and DIMM_A2 21
- Channel B DIMM_B1 and DIMM_B2 21
- 1.7.2 Memory congurations 22
- DDR3-1600(O.C.)MHz capability 23
- DDR3-1800(O.C.)MHz capability 23
- DDR3-1333MHz capability 24
- DDR3-1066MHz capability 26
- 1.7.3 Installing a DIMM 27
- 1.7.4 Removing a DIMM 27
- 1.8 Expansion slots 28
- 1.9 Jumpers 29
- USBPW5-10 30
- USBPW1-4 30
- 1.10 Connectors 31
- 1.10.2 Internal connectors 32
- SPDIF_OUT 37
- Rotation 38
- 1.11 Software support 39
- Chapter 2 41
- 42
- Updating from a BIOS file 42
- 2.1.3 ASUS CrashFree BIOS 3 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
- Pop-up window 46
- Scroll bar 46
- 2.3 Main menu 47
- SATA Port1 - Port4 [IDE] 48
- SATA Port5 - Port6 [IDE] 49
- 2.4 Advanced menu 50
- Overclock Options [Auto] 50
- Memory Clock Speed [400MHz] 51
- PCIE Clock [100] 51
- DRAM Timing Conguration 52
- Memory Over Voltage [Auto] 52
- Chipset Over Voltage [Auto] 52
- Unleashing Mode [Disabled] 53
- Active CPU Cores [Auto] 53
- 2.4.3 Chipset 54
- Parallel Port IRQ [IRQ7] 55
- Front Panel Select [HD Audio] 55
- UMA Frame Buffer Size [Auto] 55
- Surround View [Auto] 55
- Emulation Type [Auto] 56
- 2.5 Power menu 57
- CPU Q-Fan Mode [Standard] 58
- 2.6 Boot menu 59
- 2.6.3 Security 60
- Change User Password 61
- Clear User Password 61
- Password Check [Setup] 61
- 2.7 Tools menu 62
- 2.8 Exit menu 63
- ASUS contact information 65
- Ver. 110101 66
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