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Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing. ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS...
Internal connectors ............1-11 Software support ................ 1-17 1.8.1 Installing an operating system ........1-17 1.8.2 Support DVD information ..........1-17 Chapter 2: BIOS information Managing and updating your BIOS ..........2-1 2.1.1 ASUS Update utility ............2-1 2.1.2 ASUS EZ Flash 2 ............2-2 2.1.3 ASUS CrashFree BIOS ........... 2-3 BIOS setup program ..............2-3...
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2.5.3 ACPI APIC Support ............2-10 2.5.4 APM Configuration ............2-11 2.5.5 Hardware Monitor ............2-11 Boot menu .................. 2-12 2.6.1 Boot Device Priority ............2-12 2.6.2 Boot Settings Configuration .......... 2-12 2.6.3 Security ................. 2-13 Tools menu ................. 2-14 2.7.1 ASUS EZ Flash 2 ............2-14 Exit menu ..................2-14...
Consult the dealer or an experienced radio/TV technician for help. The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. Canadian Department of Communications Statement This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. This class B digital apparatus complies with Canadian ICES-003. REACH Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulatory framework, we published the chemical substances in our products at ASUS REACH website at http://green.asus.com/english/REACH.htm. DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin indicates that the product (electrical and electronic equipment) should not be placed in municipal waste. Check local regulations for disposal of electronic products. DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol of the crossed out wheeled bin indicates that the battery should not be placed in municipal waste.
Safety information Electrical safety • To prevent electric shock hazard, disconnect the power cable from the electric outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device. • Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged. • Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit. • Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company. • If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task. Where to find more information Refer to the following sources for additional information and for product and software updates. ASUS websites The ASUS website provides updated information on ASUS hardware and software products. Refer to the ASUS contact information. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package. Typography Bold text Indicates a menu or an item to select. Italics Used to emphasize a word or a phrase.
® Southbridge: Intel ICH7 ® Front Side Bus 1333/1066/800 MHz Memory Dual channel memory architecture - 2 x 240-pin DIMM sockets support unbuffered non-ECC 800/667 MHz DDR2 memory modules - Supports up to 8GB system memory * Refer to www.asus.com for the latest Memory QVL (Qualified Vendors Lists). ** When you install a total memory of 4GB or more, Windows 32-bit operating system may only recognize ® less than 3GB. We recommend a maximum of 3GB system memory if you are using a Windows 32-bit ® operating system. Graphics...
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Internal connectors 2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports 1 x IDE connector 4 x Serial ATA connectors 1 x High definition front panel audio connector 1 x System panel connector 1 x CD audio-in connector 1 x CPU fan connector 1 x Chassis fan connector 1 x 24-pin EATX power connector 1 x 4-pin ATX 12V power connector 1 x Chassis intrusion connector (optional) 1 x Floppy disk drive connector (optional) ASUS unique features ASUS CrashFree BIOS 3 ASUS Q-Fan ASUS EZ Flash 2 ASUS MyLogo 2 BIOS 8Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0, ACPI 2.0a, SM BIOS 2.5 Accessories 2 x Serial ATA cables 1 x Ultra DMA 100/66 cable 1 x I/O shield 1 x Support DVD 1 x User Manual Support DVD...
Chapter 1 Product introduction Thank you for buying an ASUS P5G41-M LX2 Series motherboard! ® Before you start installing the motherboard, and hardware devices on it, check the items in your motherboard package. Refer to page ix for the list of accessories. If any of the items is damaged or missing, contact your retailer. Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity. • Hold components by the edges to avoid touching the ICs on them. • Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that came with the component. • Before you install or remove any component, ensure that the ATX power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components. Onboard LED The motherboard comes with a standby power LED that lights up to indicate that the system is ON, in sleep mode, or in soft-off mode. This is a reminder that you must shut down the system and unplug the power cable before removing or plugging in any motherboard component. The illustration below shows the location of the onboard LED. SB_PWR P5G41-M LX2/GB Standby Power...
Motherboard overview 1.2.1 Motherboard layout Ensure that you install the motherboard into the chassis in the correct orientation. The edge with external ports goes to the rear part of the chassis. 19.1cm(7.5in) KBPWR KBMS ATX12V PRI_IDE LGA775 Place this side towards CHA_FAN the rear of the chassis. CPU_FAN USB34 USBPW1-4 LAN1_USB12 Intel ® 8112L 9LPRS441 AUDIO Lithium Cell PCIEX1 CMOS Power Super PCIEX16 P5G41-M LX2/GB SATA4 SATA3 SATA2...
Core™2 Quad / Core™2 Extreme / Core™2 Duo / Pentium dual-core / Celeron dual-core / ® ® Celeron processors. ® • Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the socket contacts are not bent. Contact your retailer immediately if the PnP cap is missing, or if you see any damage to the PnP cap/socket contacts/motherboard components. ASUS will shoulder the cost of repair only if the damage is shipment/transit-related. • Keep the cap after installing the motherboard. ASUS will process Return Merchandise Authorization (RMA) requests only if the motherboard comes with the cap on the LGA775 socket. • The product warranty does not cover damage to the socket contacts resulting from incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP cap. The motherboard supports Intel LGA775 processors with the Intel Enhanced Intel ® ® SpeedStep Technology (EIST) and Hyper-Threading Technology.
1.4.2 Memory configurations You may install 512MB, 1GB, 2GB, and 4GB unbuffered non-ECC DDR2 DIMMs into the DIMM sockets. • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor.
• • V-Data M2GVD6G3H3160Q1E52 512MB V-Data VD29608A8A-25EG20813 • • V-Data M2XSSKG3147C1L1C5Z 1024MB Samsung K4T51083QE • • H5PS1G83EFRS6C V-Data M2XHYKH3J47CC01E5Z 2048MB Hynix • • 852AK SS: Single-sided / DS: Double-sided DIMM support: • A*: Supports one module inserted into either slot as Single-channel memory configuration. • B*: Supports one pair of modules inserted into both slots as one pair of dual-channel memory configuration. Visit the ASUS website at www.asus.com for the latest QVL. Chapter 1: Product introduction...
IRQ assignments. Otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable. 1.5.3 PCI slots The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that comply with PCI specifications. 1.5.4 PCI Express x1 slot This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications. 1.5.5 PCI Express x16 slot This motherboard supports a PCI Express x16 graphics card that complies with the PCI Express specifications. ASUS P5G41-M LX2 Series...
Jumpers Clear RTC RAM (3-pin CLRTC) This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. CLRTC P5G41-M LX2/GB Normal Clear RTC (Default) P5G41-M LX2/GB Clear RTC RAM To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2. 3. Plug the power cord and turn ON the computer. 4. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data. Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure! • If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. • You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut down and reboot the system, then the BIOS automatically resets parameter settings to default values.
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This jumper allows you to enable or disable the keyboard wake-up feature. When you set this jumper to pins 2–3 (+5VSB), you can wake up the computer by pressing a key on the keyboard (the default is the Space Bar)s. This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS. KBPWR +5VSB (Default) P5G41-M LX2/GB P5G41-M LX2/GB Keyboard Power Setting USB device wake-up (3-pin USBPW1-4, USBPW5-8) Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode). USBPW1-4 +5VSB (Default) USBPW5-8 P5G41-M LX2/GB +5VSB (Default) P5G41-M LX2/GB USB Device Wake Up ASUS P5G41-M LX2 Series...
Connectors 1.7.1 Rear panel ports PS/2 mouse port (green). This port is for a PS/2 mouse. LAN (RJ-45) port. This port allows connection to a Local Area Network (LAN) through a network hub. Refer to the table below for the LAN port LED indications. P5G41-M LX2 LAN port LED indications (Orange) (Green) LED (Orange) LED (Green) Status Description Status Description No link No link ORANGE 100Mbps connection GREEN 10Mbps connection LAN port P5G41-M LX2/GB LAN port LED indications ACT/LINK SPEED Activity/Link LED...
ATX 12V Specification 2.0 or later version and provides a minimum power of 400W. • DO NOT forget to connect the 4-pin ATX12V power plug. Otherwise, the system will not boot. • We recommend that you use a PSU with a higher power output when configuring 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. ASUS P5G41-M LX2 Series 1-11...
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CPU and Chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN) Connect the fan cables to the fan connectors on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector. DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! Do not place jumper caps on the fan connectors! Only the 4-pin CPU fan supports the ASUS Q-Fan feature. CHA_FAN Rotation +12V CPU_FAN CPU FAN PWM CPU FAN IN...
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IDE ribbon cable to PIN 1. P5G41-M LX2/GB IDE connector Drive jumper setting Mode of device(s) Cable connector Single device Cable-Select or Master Black Master Black Cable-Select Slave Gray Two devices Master Master Black or gray Slave Slave • Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA cable connector. This prevents incorrect insertion when you connect the IDE cable. • Use the 80-conductor IDE cable for Ultra DMA 100/66 IDE devices. If any device jumper is set as “Cable-Select,” ensure that all other device jumpers have the same setting. ASUS P5G41-M LX2 Series 1-13...
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USB connectors (10-1 pin USB56, USB78) These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480Mbps connection speed. USB56 USB78 PIN 1 PIN 1 P5G41-M LX2/GB P5G41-M LX2/GB USB2.0 connectors Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! The USB 2.0 module is purchased separately. 1-14 Chapter 1: Product introduction...
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• If you want to connect a high-definition front panel audio module to this connector, set the Front Panel Type item in the BIOS setup to [HD Audio]. If you want to connect an AC'97 front panel audio module to this connector, set the item to [AC97]. By default, this connector is set to [HD Audio]. See section 2.4.2 Chipset for details. Optical drive audio connector (4-pin CD) These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card. P5G41-M LX2/GB P5G41-M LX2/GB Internal audio connector ASUS P5G41-M LX2 Series 1-15...
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System panel connector (10-1 pin F_PANEL) This connector supports several chassis-mounted functions. F_PANEL PLED PWRBTN PIN 1 P5G41-M LX2/GB +HDLED RESET P5G41-M LX2/GB System panel connector • System power LED (2-pin PLED) This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode. • Hard disk drive activity LED (2-pin +HDLED) This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The HD LED lights up or flashes when data is read from or written to the HDD.
Vista ® ® Service Pack 1 or later versions before installing the drivers for better compatibility and system stability. 1.8.2 Support DVD information The Support DVD that comes with the motherboard package contains the drivers, software applications, and utilities that you can install to avail all motherboard features. The contents of the Support DVD are subject to change at any time without notice. Visit the ASUS website at www.asus.com for updates. To run the Support DVD Place the Support DVD to the optical drive. The DVD automatically displays the Drivers menu if Autorun is enabled in your computer. The following screen is for reference only. Click an icon to display Support DVD/ motherboard information Click an item to install If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run the DVD.
Updating the BIOS To update the BIOS: desktop, click Start > Programs > ASUS > ASUSUpdate > From the Windows ® ASUSUpdate to launch the ASUS Update utility. From the dropdown list, select any of the updating process: Updating from the Internet a. Select Update BIOS from the Internet, then click Next. Select the ASUS FTP site nearest you to avoid network traffic, or click Auto Select then click Next. From the FTP site, select the BIOS version that you wish to download then click Next. ASUS P5G41-M LX2 Series...
ASUS EZ Flash 2 The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based utility. Before you start using this utility, download the latest BIOS file from the ASUS website at www.asus.com. To update the BIOS using EZ Flash 2: Insert the USB flash disk that contains the latest BIOS file to the USB port, then launch EZ Flash 2 in any of these two ways: Press <Alt>...
2.1.3 ASUS CrashFree BIOS The ASUS CrashFree BIOS is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using the motherboard support DVD or a removable device that contains the updated BIOS file. • The BIOS file in the support DVD may not be the latest version. Download the latest BIOS file from the ASUS website at www.asus.com.
• The default BIOS settings for this motherboard apply for most conditions to ensure optimum performance. If the system becomes unstable after changing any BIOS settings, load the default settings to ensure system compatibility and stability. Select the Load Setups Default item under the Exit Menu. See section 2.8 Exit Menu. • The BIOS setup screens shown in this section are for reference purposes only, and may not exactly match what you see on your screen. • Visit the ASUS website at www.asus.com to download the latest BIOS file for this motherboard. Main menu When you enter the BIOS Setup program, the Main menu screen appears, giving you an overview of the basic system information. BIOS SETUP UTILITY Main Advanced Power...
Allows you to set the ATA/IDE configuration. Configuration options: [Disabled] [Compatible] [Enhanced] Enhanced Mode Support On [S-ATA] Sets Serial ATA, Parallel ATA or both as native mode. Configuration options: [S-ATA+P-ATA] [S-ATA] [P-ATA]. IDE Detect Time Out (Sec) [35] Selects the time out value for detecting ATA/ATAPI devices. Configuration options: [0] [5] [10] [15] [20] [25] [30] [35] ASUS P5G41-M LX2 Series...
2.3.5 System Information This menu gives you an overview of the general system specifications. The BIOS automatically detects the items in this menu. BIOS Information Displays the auto-detected BIOS information. Processor Displays the auto-detected CPU specification. System Memory Displays the auto-detected system memory. Advanced menu The Advanced menu items allow you to change the settings for the CPU and other system devices. Take caution when changing the settings of the Advanced menu items. Incorrect field values can cause the system to malfunction.
XD feature flag to always return to zero (0). Configuration options: [Disabled] [Enabled] The following item appears only when you installed an Intel Pentium 4 or later CPU that ® ® supports the Enhanced Intel SpeedStep Technology (EIST). ® Intel(R) SpeedStep(TM) Tech [Enabled] Allows you to use the Enhanced Intel SpeedStep Technology. When set to [Enabled], you ® ® can adjust the system power settings in the operating system to use the EIST feature. Set this item to [Disabled] if you do not want to use the EIST. Configuration options: [Enabled] [Disabled] ASUS P5G41-M LX2 Series...
2.4.2 Chipset The Chipset menu allows you to change the advanced chipset settings. Select an item then press <Enter> to display the sub-menu. North Bridge Configuration Memory Remap Feature [Enabled] Allows you to enable or disable the remapping of overlapped PCI memory above the total physical memory. Configuration options: [Enabled] [Disabled] Configure DRAM Timing by SPD [Enabled] Allows you to enable or disable configurating DRAM Timing by SPD. Configuration options: [Enabled] [Disabled] Initiate Graphic Adapter [PEG/PCI] Allows you to select the graphics controller as the primary boot device.
USB Mass Storage Device Configuration USB Mass Storage Reset Delay [20 Sec] Allows you to set the maximum time that the BIOS waits for the USB storage device to initialize. Configuration options: [10 Sec] [20 Sec] [30 Sec] [40 Sec] Emulation Type [Auto] Allows you to select the emulation type. Configuration options: [Auto] [Floppy] [Forced FDD] [Hard Disk] [CDROM] ASUS P5G41-M LX2 Series...
2.4.5 PCI PnP The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices. The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA devices, and setting the memory size block for legacy ISA devices. Take caution when changing the settings of the PCI PnP menu items. Incorrect field values can cause the system to malfunction. Plug and Play O/S [No] When set to [No], BIOS configures all the devices in the system. When set to [Yes] and if you install a Plug and Play operating system, the operating system configures the Plug and Play devices not required for boot.
(RPM). If the fan is not connected to the motherboard, the field shows N/A. Select Ignored if you do not wish to display the detected speed. VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage [xxxV] or [Ignored] The onboard hardware monitor automatically detects the voltage output through the onboard voltage regulators. CPU Q-Fan Function [Disabled] Allows you to enable or disable the CPU’s Q-Fan function. Configuration options: [Disabled] [Enabled] ASUS P5G41-M LX2 Series 2-11...
2.6.1 Boot Device Priority 1st ~ xxth Boot Device These items specify the boot device priority sequence from the available devices. The number of device items that appears on the screen depends on the number of devices installed in the system. Configuration options: [Removable Dev.] [Hard Drive] [ATAPI CD-ROM] [Disabled] • To select the boot device during system startup, press <F8> when ASUS Logo appears. • To access Windows OS in Safe Mode, do any of the following: ® • Press <F5> when ASUS Logo appears. • Press <F8> after POST. 2.6.2 Boot Settings Configuration...
[Limited] - allows changes only to selected fields, such as Date and Time. [Full Access] - allows viewing and changing all the fields in the Setup utility. Change User Password Select this item to set or change the user password. The User Password item on top of the screen shows the default Not Installed. After you set a password, this item shows Installed. To set a User Password: Select the Change User Password item and press <Enter>. In the password box, key in a password containing up to six letters or numbers, or both, then press <Enter>. Confirm the password when prompted. The message Password Installed appears after you set your password successfully. To change the user password, follow the same steps in setting a user password. ASUS P5G41-M LX2 Series 2-13...
1.FAT 12/16/32 (r/w) 2.NTFS (read only) 3.CD-DISC (read only) 2.7.1 ASUS EZ Flash 2 Allows you to run ASUS EZ Flash 2. When you press <Enter>, a confirmation message appears. Use the left/right arrow key to select between [Yes] or [No], then press <Enter> to confirm your choice. See section 2.1.2 ASUS EZ Flash 2 for details. Exit menu The Exit menu items allow you to load the optimal or failsafe default values for the BIOS items, and save or discard your changes to the BIOS items. BIOS SETUP UTILITY Main Advanced...