Asus P7P55D-E LX Specifications Page 1

MotherboardP7P55D-E LX

xP7P55D-E LX specications summary(continued on the next page)ASUS Q-DesignASUS Q-LED (DRAM) ASUS Q-Slot ASUS Q-DIMMASUS Unique Features ASUS IO Level

xiP7P55D-E LX specications summary*Specifications are subject to change without notice.Back Panel I/O Ports1 x PS/2 Keyboard port (Purple) 1 x PS/2 M

xii

ASUS P7P55D-E LX1-1Chapter 1Product introduction1.2 Package contentsCheck your motherboard package for the following items.Motherboard ASUS P7P55D-E

1-2 Chapter 1: Product introductionTrue USB 3.0 SupportExperience ultra-fast data transfers at 4.8Gbps with USB 3.0—the latest connectivity standard.

ASUS P7P55D-E LX1-31.5.4 Layout contents1.5.3 Motherboard layoutEnsure that you install the motherboard into the chassis in the correct orientation.

1-4 Chapter 1: Product introduction1.6 Central Processing Unit (CPU)The motherboard comes with a surface mount LGA1156 socket designed for the Intel

ASUS P7P55D-E LX1-53. Lift the load lever in the direction of the arrow until the load plate is completely lifted.Load plateThe CPU fits in only one

1-6 Chapter 1: Product introduction7. Close the load plate (A), and then push down the load lever (B), ensuring that the front edge of the load plate

ASUS P7P55D-E LX1-71.6.2 Installing the CPU heatsink and fanThe Intel® LGA1156 processor requires a specially designed heatsink and fan assembly to e

iiCopyright © 2009 ASUSTeK Computer Inc. All Rights Reserved.No part of this manual, including the products and software described in it, may be repro

1-8 Chapter 1: Product introduction3. Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.DO NOT forget to connect the CPU

ASUS P7P55D-E LX1-91.7 System memory1.7.1 OverviewThe motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) socket

1-10 Chapter 1: Product introduction1.7.2 Memory congurationsYou may install 1GB, 2GB and 4GB unbuffered and non-ECC DDR3 DIMMs into the DIMM socket

ASUS P7P55D-E LX1-11P7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-1067MHz capability for CPU at 2.66, 2.8 and 2.93GHzP7P55D-E LX Motherboa

1-12 Chapter 1: Product introductionP7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-1333MHz capability for CPU at 2.66, 2.8 and 2.93GHz (con

ASUS P7P55D-E LX1-13P7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-1600MHz capability for CPU at 2.66GHz Vendor Part No. SizeSS/DSChip Bran

1-14 Chapter 1: Product introductionP7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-1800MHz capability for CPU at 2.66GHzP7P55D-E LX Motherb

ASUS P7P55D-E LX1-15P7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-1866MHz capability for CPU at 2.66GHzP7P55D-E LX Motherboard Qualied Ve

1-16 Chapter 1: Product introductionP7P55D-E LX Motherboard Qualied Vendors Lists (QVL) DDR3-2133MHz capability for CPU at 2.8 and 2.93GHzP7P5

ASUS P7P55D-E LX1-171.8 Expansion slotIn the future, you may need to install expansion cards. The following sub-sections describe the slot and the ex

iiiContentsContents ... iiiNotices ...

1-18 Chapter 1: Product introduction1.9 JumperClear RTC RAM (3-pin CLRTC)This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You c

ASUS P7P55D-E LX1-19• The DRAM_LED also lights when the DIMM is not properly installed. Turn off the system and reinstall the DIMM before using the M

1-20 Chapter 1: Product introduction2. IO Level UPThe IO Level UP switch allows performance boost of the USB 3.0 ports on the rear pan

ASUS P7P55D-E LX1-211.11 Connectors1.11.1 Rear panel connectors4. USB 3.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect t

1-22 Chapter 1: Product introduction1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)These connectors are for ATX power supply plugs. The power

ASUS P7P55D-E LX1-233. Front panel audio connector (10-1 pin AAFP)This connector is for a chassis-mounted front panel audio I/O module that supports

1-24 Chapter 1: Product introduction• These connectors are set to Standard IDE mode by default. In Standard IDE mode, you can connect Serial ATA boot

ASUS P7P55D-E LX1-256. USB connectors (10-1 pin USB910; USB1112; USB1314)These connectors are for USB 2.0 ports. Connect the USB module cable to any

1-26 Chapter 1: Product introduction8. Digital audio connector (4-1 pin SPDIF_OUT)This connector is for an additional Sony/Philips Digital Interface

ASUS P7P55D-E LX1-2710. JMicron® JMB361 IDE Connector (40-1 pin PRI_IDE [Blue])The onboard IDE connector is for the Ultra DMA 133/100/66 signal cable

ivContentsChapter 2: BIOS setup 2-12.1 Managing and updating your BIOS ... 2-12.1.1 ASUS Update ...

1-28 Chapter 1: Product introduction1.11.3 Onboard LEDs1. POST State LEDPOST State LED checks DRAM during motherboard booting process. If an error i

ASUS P7P55D-E LX1-29If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to locate the file ASSETUP.EXE from the BIN fol

1-30 Chapter 1: Product introduction

ASUS P7P55D-E LX2-1Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to restore the BIOS in the future. Copy the

2-2 Chapter 2: BIOS information2.1.2 ASUS EZ Flash 2The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based utility. Befo

ASUS P7P55D-E LX2-32. When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process and automatically reboots the system when done

2-4 Chapter 2: BIOS informationBooting the system in DOS environment1. Insert the USB flash drive with the latest BIOS file and BIOS Updater to the U

ASUS P7P55D-E LX2-52. The BIOS Updater backup screen appears indicating the BIOS backup process. When BIOS backup is done, press any key to return to

2-6 Chapter 2: BIOS information4. Select Yes and press <Enter>. When BIOS update is done, press <ESC> to exit BIOS Updater. Restart your

ASUS P7P55D-E LX2-72.2 BIOS setup programUse the BIOS Setup program to update the BIOS or configure its parameters. The BIOS screens include navigati

v2.5 Advanced menu ... 2-162.5.1 CPU Configuration ...

2-8 Chapter 2: BIOS information2.3.1 SATA 1-6While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices. There is a separa

ASUS P7P55D-E LX2-9• If you want to use the Serial ATA hard disk drives as Parallel ATA physical storage devices, keep the default setting [IDE].• I

2-10 Chapter 2: BIOS information2.4 Ai Tweaker menuThe Ai Tweaker menu items allow you to configure overclocking-related items.Be cautious when chang

ASUS P7P55D-E LX2-112.4.2 Ai Overclock Tuner [Auto]Allows selection of CPU overclocking options to achieve desired CPU internal frequency. Select eit

2-12 Chapter 2: BIOS information2.4.3 CPU Ratio Setting [Auto]Allows you to adjust the ratio between CPU Core Clock and BCLK Frequency. Use the <+

ASUS P7P55D-E LX2-132.4.9 DRAM Timing Control [Auto]The items in this menu allow you to set the DRAM timing control features.The configuration option

2-14 Chapter 2: BIOS information2.4.10 CPU Differential Amplitude [Auto]Different AMP might enhance BCLK overclocking ability. Configuration options:

ASUS P7P55D-E LX2-152.4.16 PCH Voltage [Auto]Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.49V with a 0.02V

2-16 Chapter 2: BIOS information2.5.1 CPU CongurationThe items in this menu show the CPU-related information that the BIOS automatically detects.CPU

ASUS P7P55D-E LX2-17Max CPUID Value Limit [Disabled][Enabled] Allows legacy operating systems to boot even without support for CPUs with extended CPU

viNoticesFederal Communications Commission StatementThis device complies with Part 15 of the FCC Rules. Operation is subject to the following two cond

2-18 Chapter 2: BIOS information2.5.2 Uncore CongurationThe Uncore Configuration menu allows you to change the advanced chipset settings. Memory Rem

ASUS P7P55D-E LX2-19Onboard USB 3.0 Controller [Enabled][Enabled] Enables the onboard USB 3.0 controller.[Disabled] Disables the onboard USB 3.0 con

2-20 Chapter 2: BIOS information2.6 Power menuThe Power menu items allow you to change the settings for the Advanced Power Management (APM). Select a

ASUS P7P55D-E LX2-212.6.6 APM CongurationRestore On AC Power Loss [Power Off][Power Off] The system goes into off state after an AC power loss.[Pow

2-22 Chapter 2: BIOS information2.6.7 Hardware MonitorCPU/MB Temperature [xxx�C/xxx�F][xxx�C/xxx�F]The onboard hardware monitor automatically detects

ASUS P7P55D-E LX2-232.7 Boot menuThe Boot menu items allow you to change the system boot options. Select an item then press <Enter> to display

2-24 Chapter 2: BIOS information2.7.3 SecurityThe Security menu items allow you to change the system security settings. Select an item then press <

ASUS P7P55D-E LX2-252.8 Tools menuThe Tools menu items allow you to configure options for special functions. Select an item then press <Enter>

2-26 Chapter 2: BIOS information2.8.2 AI NET 2Check Realtek LAN Cable [Disabled][Disabled] BIOS will not check the Realtek LAN cable during the Powe

ASUS P7P55D-E LX2-272.9 Exit menuThe Exit menu items allow you to load the optimal or failsafe default values for the BIOS items, and save or discard

viiSafety informationElectrical safety• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating t

2-28 Chapter 2: BIOS information

viiiAbout this guideThis user guide contains the information you need when installing and configuring the motherboard.How this guide is organizedThis

ixP7P55D-E LX specications summary(continued on the next page)CPU LGA1156 socket for Intel® Core™ i7 / Core™ i5 / Core™ i3 processors Supports Int