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... if you install a total memory of 2560x1600@60Hz Supports D-Sub with HD audio module in the market. • Refer to www.asus.com for the AMD® APU support list. USB A55M-A/USB3 ASMedia 1042 - 2 x USB 3.0/2.0 ports at the back panel AMD® A55 FCH: - 6 x USB 2.0/1.1 ports (4 ...ports at the mid-board, 2 ports at the back panel) A55M-A AMD® A55 FCH: - 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports...
... if you install a total memory of 2560x1600@60Hz Supports D-Sub with HD audio module in the market. • Refer to www.asus.com for the AMD® APU support list. USB A55M-A/USB3 ASMedia 1042 - 2 x USB 3.0/2.0 ports at the back panel AMD® A55 FCH: - 6 x USB 2.0/1.1 ports (4 ...ports at the mid-board, 2 ports at the back panel) A55M-A AMD® A55 FCH: - 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports...
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A55M-A Series specifications summary ASUS unique features ASUS USB 3.0 Boost (A55M-A/USB3 only) DIGI+ Power Control: Digital Power Design for the APU ASUS 3+2 Phase Power Design Network iControl ASUS EPU ASUS AI Suite II ASUS UEFI BIOS EZ Mode ASUS Anti-Surge Protection ASUS Fan Xpert ASUS CrashFree BIOS 3 ASUS Fanless Design: Stylish Heatsink Solution ASUS ESD ASUS EZ Flash 2 ASUS MyLogo 2™ 100% All high-quality...
A55M-A Series specifications summary ASUS unique features ASUS USB 3.0 Boost (A55M-A/USB3 only) DIGI+ Power Control: Digital Power Design for the APU ASUS 3+2 Phase Power Design Network iControl ASUS EPU ASUS AI Suite II ASUS UEFI BIOS EZ Mode ASUS Anti-Surge Protection ASUS Fan Xpert ASUS CrashFree BIOS 3 ASUS Fanless Design: Stylish Heatsink Solution ASUS ESD ASUS EZ Flash 2 ASUS MyLogo 2™ 100% All high-quality...
A55M-A User's Manual
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... USB34 AMD® A55 SATA6G_5 SATA6G_6 SATA6G_3 SATA6G_4 SATA6G_1 SATA6G_2 32Mb BIOS CLRTC SPEAKER F_PANEL EATXPWR ASUS A55M-A Series motherboard User Guide 2 x Serial ATA 3.0 Gb/s cables 1 x I/O Shield User Guide Support DVD • A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. Package contents Check your retailer. • The illustrated items above items is damaged or missing...
... USB34 AMD® A55 SATA6G_5 SATA6G_6 SATA6G_3 SATA6G_4 SATA6G_1 SATA6G_2 32Mb BIOS CLRTC SPEAKER F_PANEL EATXPWR ASUS A55M-A Series motherboard User Guide 2 x Serial ATA 3.0 Gb/s cables 1 x I/O Shield User Guide Support DVD • A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. Package contents Check your retailer. • The illustrated items above items is damaged or missing...
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USB 3.0 Boost (A55M-A/USB3 only) With USB 3.0 Boost technology, a USB device's transmission speed is significantly increased, adding to personalize your favorite photos into 256-color boot logos to an already impressive USB 3.0 transfer speed. ASUS MyLogo2™ Turn your system. ASUS CrashFree BIOS 3 ASUS CrashFree BIOS 3 allows you to restore a corrupted BIOS file from a USB storage device that contains the BIOS file. ASUS A55M-A Series 1-3 ASUS software automatically accelerates data speeds for compatible USB 3.0 peripherals without the need for any user interaction.
USB 3.0 Boost (A55M-A/USB3 only) With USB 3.0 Boost technology, a USB device's transmission speed is significantly increased, adding to personalize your favorite photos into 256-color boot logos to an already impressive USB 3.0 transfer speed. ASUS MyLogo2™ Turn your system. ASUS CrashFree BIOS 3 ASUS CrashFree BIOS 3 allows you to restore a corrupted BIOS file from a USB storage device that contains the BIOS file. ASUS A55M-A Series 1-3 ASUS software automatically accelerates data speeds for compatible USB 3.0 peripherals without the need for any user interaction.
A55M-A User's Manual
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... uninstall any component, place it on a grounded antistatic pad or in soft-off the ATX power supply and detach its power cord. A55M-A/USB3 SB_PWR ON OFF Standby Power Powered Off A55M-A/USB3 Onboard LED 1-4 Chapter 1: Product introduction This is a reminder that the system is ON, in sleep mode, or in the bag that...
... uninstall any component, place it on a grounded antistatic pad or in soft-off the ATX power supply and detach its power cord. A55M-A/USB3 SB_PWR ON OFF Standby Power Powered Off A55M-A/USB3 Onboard LED 1-4 Chapter 1: Product introduction This is a reminder that the system is ON, in sleep mode, or in the bag that...
A55M-A User's Manual
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Place this side towards the rear of the chassis as indicated in the correct orientation. Doing so can damage the motherboard. A55M-A/USB3 ASUS A55M-A Series 1-5 The edge with external ports goes to the chassis. 1.3 Motherboard overview 1.3.1 Placement direction When installing the motherboard, ensure that you place it into the chassis in the image below. 1.3.2 Screw holes Place six screws into the holes indicated by circles to secure the motherboard to the rear part of the chassis. DO NOT overtighten the screws!
Place this side towards the rear of the chassis as indicated in the correct orientation. Doing so can damage the motherboard. A55M-A/USB3 ASUS A55M-A Series 1-5 The edge with external ports goes to the chassis. 1.3 Motherboard overview 1.3.1 Placement direction When installing the motherboard, ensure that you place it into the chassis in the image below. 1.3.2 Screw holes Place six screws into the holes indicated by circles to secure the motherboard to the rear part of the chassis. DO NOT overtighten the screws!
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The package contents vary between models. 1.3.3 Motherboard layout A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The layout illustrations in this user guide are for A55MA/USB3 only. 1 2 3 4 5 18.8cm(7.4in) KBMS HDMI ATX12V CPU_FAN CHA_FAN DIGI +VRM DDR3 DIMM_A1 (64bit, ... DDR3 DIMM_B1 (64bit, 240-pin module) SOCKET FM2 DVI_VGA USB1112 23.6cm(9.3in) LAN1_USB12 ASM 1042 EATXPWR KB_USBWB AUDIO 2 A55M-A/USB3 PCIEX16 RTL 8111F Super I/O PCIEX1_1 BATTERY PCI1 SATA6G_5 SATA6G_6 AMD® A55 SATA6G_3 SATA6G_4 6 SB_PWR ALC 887 SPDIF_OUT AAFP SATA6G_1...
The package contents vary between models. 1.3.3 Motherboard layout A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The layout illustrations in this user guide are for A55MA/USB3 only. 1 2 3 4 5 18.8cm(7.4in) KBMS HDMI ATX12V CPU_FAN CHA_FAN DIGI +VRM DDR3 DIMM_A1 (64bit, ... DDR3 DIMM_B1 (64bit, 240-pin module) SOCKET FM2 DVI_VGA USB1112 23.6cm(9.3in) LAN1_USB12 ASM 1042 EATXPWR KB_USBWB AUDIO 2 A55M-A/USB3 PCIEX16 RTL 8111F Super I/O PCIEX1_1 BATTERY PCI1 SATA6G_5 SATA6G_6 AMD® A55 SATA6G_3 SATA6G_4 6 SB_PWR ALC 887 SPDIF_OUT AAFP SATA6G_1...
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... 1-26 1-26 1-20 1-28 1-21 1-27 1-27 1-4 1.4 Accelerated Processing Unit (APU) This motherboard comes with an FM2 socket designed for the FM2 socket. A55M-A/USB3 A55M-A/USB3 CPU socket FM2 ASUS A55M-A Series 1-7 Ensure that you use a APU designed for AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics. The APU...
... 1-26 1-26 1-20 1-28 1-21 1-27 1-27 1-4 1.4 Accelerated Processing Unit (APU) This motherboard comes with an FM2 socket designed for the FM2 socket. A55M-A/USB3 A55M-A/USB3 CPU socket FM2 ASUS A55M-A Series 1-7 Ensure that you use a APU designed for AMD® A-series accelerated processors with AMD® Radeon™ HD 7000 series graphics. The APU...
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The figure illustrates the location of the DDR3 DIMM sockets: DIMM_A1 DIMM_B1 A55M-A/USB3 Channel Channel A Channel B A55M-A/USB3 240-pin DDR3 DIMM sockets Sockets DIMM_A1 DIMM_B1 ASUS A55M-A Series 1-11 DDR3 modules are developed for better performance with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) sockets. 1.5 System memory 1.5.1 Overview This motherboard comes with less power consumption. A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket.
The figure illustrates the location of the DDR3 DIMM sockets: DIMM_A1 DIMM_B1 A55M-A/USB3 Channel Channel A Channel B A55M-A/USB3 240-pin DDR3 DIMM sockets Sockets DIMM_A1 DIMM_B1 ASUS A55M-A Series 1-11 DDR3 modules are developed for better performance with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) sockets. 1.5 System memory 1.5.1 Overview This motherboard comes with less power consumption. A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket.
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Realtek LAN controller - shared - - - - PCIEx1_1 shared - - - - - - - shared - - - - - - On Chip USB EHCI 1/2/3/4 shared ASM1042 USB3.0 controller - - shared - - - shared - - - - - HD audio shared - - - - - - - SATA controller - - - On Chip USB EHCI 1/2/3 - PCI1 slot - - - - shared - - - - - - ASUS A55M-A Series 1-19 IRQ assignments for this motherboard A B C D E F G H PCIEx16_1 - - shared - - - - -
Realtek LAN controller - shared - - - - PCIEx1_1 shared - - - - - - - shared - - - - - - On Chip USB EHCI 1/2/3/4 shared ASM1042 USB3.0 controller - - shared - - - shared - - - - - HD audio shared - - - - - - - SATA controller - - - On Chip USB EHCI 1/2/3 - PCI1 slot - - - - shared - - - - - - ASUS A55M-A Series 1-19 IRQ assignments for this motherboard A B C D E F G H PCIEx16_1 - - shared - - - - -
A55M-A User's Manual
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... date, time, and system setup parameters by erasing the CMOS RTC RAM data. Turn OFF the computer and unplug the power cord. 2. A55M-A/USB3 CLRTC 12 23 Normal (Default) Clear RTC A55M-A/USB3 Clear RTC RAM To erase the RTC RAM: 1. After clearing the CMOS, reinstall the battery. • You do not help, remove...
... date, time, and system setup parameters by erasing the CMOS RTC RAM data. Turn OFF the computer and unplug the power cord. 2. A55M-A/USB3 CLRTC 12 23 Normal (Default) Clear RTC A55M-A/USB3 Clear RTC RAM To erase the RTC RAM: 1. After clearing the CMOS, reinstall the battery. • You do not help, remove...
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... under normal condition or in the BIOS. KB_USBPWB 12 23 A55M-A/USB3 +5V +5VSB (Default) A55M-A/USB3 Keyboard and USB device wake up the computer by pressing a key on the keyboard. When you can wake up ASUS A55M-A Series 1-21 A55M-A/USB3 USBPWF 12 23 +5V +5VSB (Default) A55M-A/USB3 USB device wake up • The USB device wake-up...
... under normal condition or in the BIOS. KB_USBPWB 12 23 A55M-A/USB3 +5V +5VSB (Default) A55M-A/USB3 Keyboard and USB device wake up the computer by pressing a key on the keyboard. When you can wake up ASUS A55M-A Series 1-21 A55M-A/USB3 USBPWF 12 23 +5V +5VSB (Default) A55M-A/USB3 USB device wake up • The USB device wake-up...
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... of maximum 2A (24 W) fan power. • Only the CPU_FAN connector support the ASUS Fan Xpert feature. USB 2.0 ports 1 and 2. USB 3.0 ports 11 and 12 (A55M-A/USB3 only). This port is for connecting USB 3.0 devices. This port is for a PS/2... keyboard. 1.8.2 Internal connectors 1. CPU_FAN CHA_FAN A55M-A/USB3 A55M-A/USB3 CPU fan connector DO NOT forget to connect the fan cables to CRT and isn't compatible with DVI-I 10. CPU FAN PWM CPU FAN IN CPU FAN PWR GND Rotation +12V GND ASUS A55M...
... of maximum 2A (24 W) fan power. • Only the CPU_FAN connector support the ASUS Fan Xpert feature. USB 2.0 ports 1 and 2. USB 3.0 ports 11 and 12 (A55M-A/USB3 only). This port is for connecting USB 3.0 devices. This port is for a PS/2... keyboard. 1.8.2 Internal connectors 1. CPU_FAN CHA_FAN A55M-A/USB3 A55M-A/USB3 CPU fan connector DO NOT forget to connect the fan cables to CRT and isn't compatible with DVI-I 10. CPU FAN PWM CPU FAN IN CPU FAN PWR GND Rotation +12V GND ASUS A55M...
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... GND +3 Volts +12 Volts +12 Volts +5V Standby Power OK PIN 1 GND +5 Volts GND +5 Volts GND +3 Volts +3 Volts PIN 1 A55M-A/USB3 ATX power connectors GND +5 Volts +5 Volts +5 Volts -5 Volts GND GND GND PSON# GND -12 Volts +3 Volts • We recommend that the PSU has a minimum power ... fit. The system may become unstable or may not boot up . • We recommend that the 20-pin power plug can provide at http://support.asus. The system may become unstable or may not boot up if the power is inadequate. • DO NOT forget to use an ATX 12V Specification...
... GND +3 Volts +12 Volts +12 Volts +5V Standby Power OK PIN 1 GND +5 Volts GND +5 Volts GND +3 Volts +3 Volts PIN 1 A55M-A/USB3 ATX power connectors GND +5 Volts +5 Volts +5 Volts -5 Volts GND GND GND PSON# GND -12 Volts +3 Volts • We recommend that the PSU has a minimum power ... fit. The system may become unstable or may not boot up . • We recommend that the 20-pin power plug can provide at http://support.asus. The system may become unstable or may not boot up if the power is inadequate. • DO NOT forget to use an ATX 12V Specification...
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... SATA3G_3 SATA3G_4 GND RSATA_RXP4 RSATA_RXN4 GND RSATA_TXN4 RSATA_TXP4 GND GND RSATA_RXP3 RSATA_RXN3 GND RSATA_TXN3 RSATA_TXP3 GND A55M-A/USB3 SATA3G_1 SATA3G_2 GND RSATA_RXP1 RSATA_RXN1 GND RSATA_TXN1 RSATA_TXP1 GND GND RSATA_RXP2 RSATA_RXN2 GND RSATA_TXN2 RSATA_TXP2 GND A55M-A/USB3 SATA 3.0Gb/s connectors • These connectors are using Windows® XP SP3 or later...connectors in the BIOS to [AHCI]. 3. See section 2.5.2 SATA Configuration for Serial ATA hard disk drives and optical disc drives. ASUS A55M-A Series 1-25 See section 2.5.2 SATA Configuration for details.
... SATA3G_3 SATA3G_4 GND RSATA_RXP4 RSATA_RXN4 GND RSATA_TXN4 RSATA_TXP4 GND GND RSATA_RXP3 RSATA_RXN3 GND RSATA_TXN3 RSATA_TXP3 GND A55M-A/USB3 SATA3G_1 SATA3G_2 GND RSATA_RXP1 RSATA_RXN1 GND RSATA_TXN1 RSATA_TXP1 GND GND RSATA_RXP2 RSATA_RXN2 GND RSATA_TXN2 RSATA_TXP2 GND A55M-A/USB3 SATA 3.0Gb/s connectors • These connectors are using Windows® XP SP3 or later...connectors in the BIOS to [AHCI]. 3. See section 2.5.2 SATA Configuration for Serial ATA hard disk drives and optical disc drives. ASUS A55M-A Series 1-25 See section 2.5.2 SATA Configuration for details.
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Connect the chassis power LED cable to hear system beeps and warnings. +5V GND GND Speaker Out A55M-A/USB3 SPEAKER PIN 1 A55M-A/USB3 Speaker Out Connector 1-26 Chapter 1: Product introduction Speaker connector (4-pin SPEAKER) The 4-pin connector is for the system power ...This connector supports several chassis-mounted functions. F_PANEL PWR LED PWR BTN PLED+ PLEDPWR GND HD_LED+ HD_LED- Ground HWRST# (NC) A55M-A/USB3 PIN 1 +HD_LED RESET A55M-A/USB3 System panel connector • System power LED (2-pin PLED) This 2-pin connector is read from or written to this connector. The...
Connect the chassis power LED cable to hear system beeps and warnings. +5V GND GND Speaker Out A55M-A/USB3 SPEAKER PIN 1 A55M-A/USB3 Speaker Out Connector 1-26 Chapter 1: Product introduction Speaker connector (4-pin SPEAKER) The 4-pin connector is for the system power ...This connector supports several chassis-mounted functions. F_PANEL PWR LED PWR BTN PLED+ PLEDPWR GND HD_LED+ HD_LED- Ground HWRST# (NC) A55M-A/USB3 PIN 1 +HD_LED RESET A55M-A/USB3 System panel connector • System power LED (2-pin PLED) This 2-pin connector is read from or written to this connector. The...
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6. ASUS A55M-A Series 1-27 Connect one end of the motherboard high-definition audio capability. • If you connect a high-definition front panel audio module to this connector ... section 2.5.5 Onboard Devices Configuration for details. • The front panel audio I/O module is for an additional Sony/Philips Digital Interface (S/PDIF) port. +5V SPDIFOUT GND A55M-A/USB3 SPDIF_OUT A55M-A/USB3 Digital audio connector The S/PDIF module is purchased separately. 7. Digital audio connector (4-1 pin SPDIF_OUT) This connector is for a chassis-mounted front panel audio I/O module...
6. ASUS A55M-A Series 1-27 Connect one end of the motherboard high-definition audio capability. • If you connect a high-definition front panel audio module to this connector ... section 2.5.5 Onboard Devices Configuration for details. • The front panel audio I/O module is for an additional Sony/Philips Digital Interface (S/PDIF) port. +5V SPDIFOUT GND A55M-A/USB3 SPDIF_OUT A55M-A/USB3 Digital audio connector The S/PDIF module is purchased separately. 7. Digital audio connector (4-1 pin SPDIF_OUT) This connector is for a chassis-mounted front panel audio I/O module...
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... the back of these connectors, then install the module to 480Mbps connection speed. USB56 USB34 USB+5V USB_P6USB_P6+ GND NC USB+5V USB_P4USB_P4+ GND NC A55M-A/USB3 PIN 1 PIN 1 USB+5V USB_P5USB_P5+ GND USB+5V USB_P3USB_P3+ GND A55M-A/USB3 USB2.0 connectors Never connect a 1394 cable to the USB connectors.
... the back of these connectors, then install the module to 480Mbps connection speed. USB56 USB34 USB+5V USB_P6USB_P6+ GND NC USB+5V USB_P4USB_P4+ GND NC A55M-A/USB3 PIN 1 PIN 1 USB+5V USB_P5USB_P5+ GND USB+5V USB_P3USB_P3+ GND A55M-A/USB3 USB2.0 connectors Never connect a 1394 cable to the USB connectors.
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... using the motherboard support DVD or a USB flash drive that you press to load default BIOS values. The utility automatically checks the devices for A55M-A USB3). • The BIOS file in the support DVD may not be the latest version. DO NOT shut down or reset the system while updating... the BIOS! You can cause system boot failure! When found, the utility reads the BIOS file and enters ASUS EZ Flash 2 utility automatically. 4. Doing so can restore a corrupted BIOS file using this utility, rename the BIOS file in the removable device into...
... using the motherboard support DVD or a USB flash drive that you press to load default BIOS values. The utility automatically checks the devices for A55M-A USB3). • The BIOS file in the support DVD may not be the latest version. DO NOT shut down or reset the system while updating... the BIOS! You can cause system boot failure! When found, the utility reads the BIOS file and enters ASUS EZ Flash 2 utility automatically. 4. Doing so can restore a corrupted BIOS file using this utility, rename the BIOS file in the removable device into...