Asus A55M-A Specifications Page 36
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- Table of contents
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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 ATX +12V 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.
A55M-A/USB3
A55M-A/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
Chapter 1: Product introduction
1-24
- Motherboard 1
- First Edition 2
- January 2013 2
- Contents 3
- BIOS information 4
- Appendices 5
- Safety information 6
- About this guide 7
- Typography 8
- (continued on the next page) 9
- User Guide 11
- Product introduction 13
- ASUS MyLogo2™ 15
- ASUS CrashFree BIOS 3 15
- 1.2 Before you proceed 16
- A55M-A/USB3 17
- 1.3.3 Motherboard layout 18
- 1.3.4 Layout contents 19
- 1.4.1 APU installation 20
- ASUS A55M-A Series 21
- 1.5 System memory 23
- 1.5.2 Memory congurations 24
- DDR3 1600 MHz capability 25
- DDR3 1333 MHz capability 26
- DDR3 1066 MHz capability 28
- 1.5.3 Installing a DIMM 29
- 1.6 Expansion slots 30
- A55M-A/USB3 Clear RTC RAM 32
- KB_USBPWB 33
- 1.8.1 Rear panel ports 34
- 1.8.2 Internal connectors 35
- SPDIF_OUT 39
- A55M-A/USB3 USB2.0 connectors 40
- 1.9 Software support 41
- 2.1.2 ASUS EZ Flash 2 44
- Recovering the BIOS 45
- 2.1.4 ASUS BIOS Updater 46
- Updating the BIOS le 47
- 2.2 BIOS setup program 48
- Advanced Mode 50
- Menu bar 50
- 2.3 Main menu 52
- Administrator Password 53
- User Password 53
- 2.4 Ai Tweaker menu 54
- 2.4.3 APU Multiplier [Auto] 55
- 2.4.4 NB Frequency [Auto] 55
- 2.4.6 DRAM Timing Control 56
- 2.4.8 DRAM Voltage [Auto] 56
- 2.4.9 SB 1.1V Voltage [Auto] 56
- 2.4.10 DIGI+ VRM 57
- 2.5 Advanced menu 58
- 2.5.2 SATA Conguration 60
- 2.5.3 USB Conguration 61
- 2.5.4 NB Conguration 61
- 2-20 ASUS A55M-A Series 62
- 2.5.6 APM 63
- 2.5.7 Network Stack 64
- 2.6 Monitor menu 65
- 2.7 Boot menu 67
- 2.7.1 Fast Boot [Enabled] 68
- 2.7.10 Secure Boot 70
- 2.7.9 CSM Parameters 70
- 2.7.12 Boot Override 71
- 2.8 Tools menu 72
- 2.9 Exit menu 73
- 2-32 ASUS A55M-A Series 74
- ASUS contact information 77
- DECLARATION OF CONFORMITY 78
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