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The information in this User’s Manual has been carefully reviewed and is believed to be accurate. The vendor assumes no responsibility for any inaccuracies that may be contained in this document, makes no commitment to update or to keep current the information in this manual, or to notify any person or organization of the updates.
Intel Core™ microarchitecture while remaining compatible with the IA-32 software. With twin-platfom design, op- tional Infi niBand and SAS connections build-in, he X7DCT-L/X7DCT-LF/X7DCT-3/ X7DCT-3F/X7DCT-3IBXF provides the performance and feature set required for dual processor-based high-end computer systems with confi guration options optimized for intensive computing, high energy-effi...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Conventions Used in the Manual Special attention should be given to the following symbols for proper installation and to prevent damage done to the components or injury to yourself. Danger/Caution: Instructions to be strictly followed to prevent cata- strophic system failure or to avoid bodily injury.
Contacting Supermicro Contacting Supermicro Headquarters Address: Super Micro Computer, Inc. 980 Rock Ave. San Jose, CA 95131 U.S.A. Tel: +1 (408) 503-8000 Fax: +1 (408) 503-8008 Email: marketing@supermicro.com (General Information) support@supermicro.com (Technical Support) Web Site: www.supermicro.com Europe Address: Super Micro Computer B.V. Het Sterrenbeeld 28, 5215 ML 's-Hertogenbosch, The Netherlands Tel:...
Contacting Supermicro ....................5 Chapter 1 Introduction ................1 Overview ......................1 Checklist ......................1 X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF Quick Reference ..5 Motherboard Features ..................8 Chipset and Processor Features Overview ............11 The 5100 Memory Controller Hub (MCH) ............11 The Ninth Generation I/O Controller Hub (ICH9R) ...........11 Special Features ....................
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Table of Contents Back Panel Connectors/IO Ports ............... 9 Front Control Panel ..................10 Front Control Panel Pin Defi nitions..............11 NMI Button ....................11 Power LED ....................11 HDD LED ..................... 12 NIC1/NIC2 LED Indicators ................12 Overheat/Fan Fail LED (OH)............... 13 Power Fail LED ...................
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Installing the Windows XP/2003 OS for Systems with RAID Functions .... 1 Installing the Windows XP/2003 OS for Systems without RAID Functions ..2 Appendix C Installing Other Software Programs and Drivers ....1 Installing Other Drivers ..................1 Confi guring Supero Doctor II ................2...
Chapter 1: Introduction Chapter 1 Introduction Overview Checklist Congratulations on purchasing your computer motherboard from an acknowledged leader in the industry. Supermicro boards are designed with the utmost attention to detail to provide you with the highest standards in quality and performance. Check that the following items have all been included with your motherboard.
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X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF Image Note: The drawings and pictures shown in this manual were based on the latest PCB Revision available at the time of publishing of the manual. The motherboard you’ve received may or may not look exactly the same as the...
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X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual LED Indicator Label Description Status LED1 (-3IBXF) InfiniBand Link LED Green: On (Normal) LED2 (-3IBXF) IB Activity LED Yellow: Blinking (Active) LED3 Onboard Power LED Green: On (PWR On) LED6 (-3/-3IBXF) SAS Heartbeat LED Green: Blinking (Normal)
• CPU slow-down on temperature overheat • CPU thermal trip support for processor protection • Power-up mode control for recovery from AC power loss • PECI (Platform Environment Confi guration Interface) support • System resource alert via Supero Doctor III...
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One COM port • Intel ICH9R supports four SATA ports (with support of RAID 0, 1,10 and 5 in the Windows OS environment; RAID 0, 1 and 10 in Unix) (X7DCT-L/X7DCT- LF) (Note 1) • LSI 1064E SAS Controller supports four onboard SAS ports (X7DCT-3/X7DCT- 3F/X7DCT-3IBXF) •...
Chapter 1: Introduction Chipset and Processor Features Overview Built upon the functionality and the capability of the Intel 5100 chipset, the X7DCT-L/ X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF motherboard provides the per- formance and feature set required for dual processor-based high-end computer systems with confi guration options optimized for intensive computing, high energy- effi...
Control setting in the Advanced BIOS Setup section to change this setting. The default setting is Last State. PC Health Monitoring This section describes the PC health monitoring features of the X7DCT-L/X7DCT- LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF. All have an onboard System Hardware Monitor chip that supports PC health monitoring.
It is even more important for processors that have high CPU clock rates. The X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF can only accommo- date Supermicro proprietary power supply. Please refer to Note 1, Note 2 on Page 1-5 in Chapter 1 and Section 2-5 in Chapter 2for detailed information.
Chapter 2: Installation Chapter 2 Installation Static-Sensitive Devices Electro-Static-Discharge (ESD) can damage electronic com ponents. To prevent damage to your system board, it is important to handle it very carefully. The following measures are generally suffi cient to protect your equipment from ESD. Precautions •...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Motherboard Installation All motherboards have standard mounting holes to fi t different types of chassis. Make sure that the locations of all the mounting holes for both motherboard and chassis match. Although a chassis may have both plastic and metal mounting fas- teners, metal ones are highly recommended because they ground the motherboard to the chassis.
Chapter 2: Installation Processor and Heatsink Fan Installation Warning: When handling the processor package, avoid placing direct pressure on the label area of the fan. Notes: Always connect the power cord last and always remove it before adding, removing or changing any components. Make sure that you install the pro- cessor into the CPU socket before you install the CPU heatsink.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Loading the Processor into the Socket North Align CPU Pin1 (the CPU corner Center marked with a triangle) against the Edge socket corner that is marked with a South triangle cutout. Center Edge Align the CPU key that is the...
Chapter 2: Installation Installing the Heatsink CEK Heatsink Installation CEK Passive Heatsink Do not apply any thermal grease to the heatsink or the CPU die; the required amount has already been applied. Place the heatsink on top of the CPU so that the four mounting holes are Screw#1 Screw#2...
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X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Unscrew and remove the heatsink screws from the motherboard in the sequence as shown in the picture on the right. Hold the heatsink as shown in the pic- ture on the right and gently wriggle the heatsink to loosen it from the CPU. (Do...
DIMM 1A and DIMM 1B, DIMM 2A and DIMM 2B, then DIMM 3A, DIMM 3B. Memory Support The X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF supports up to 48 GB ECC Registered DDR2 667/533 in 6 DIMMs. Populating memory slots of the same bank with a pair of memory modules of the same size and same type will result in two-way Interleaved Memory which will improve memory performance.
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X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Possible System Memory Allocation & Availability System Device Size Physical Memory Remaining (-Available) (4 GB Total System Memory) Firmware Hub fl ash memory (System BIOS) 1 MB 3.99 Local APIC 4 KB 3.99 Area Reserved for the chipset 2 MB 3.99...
The I/O ports are color coded in conformance with the PC 99 specifi cation. See the graphics below for the colors and locations of the various I/O ports. Back Panel Connectors/IO Ports Back Panel Connectors USB 0/1 (USB0: Bottom, USB1: Top) X7DCT-L Rev. 1.2 IPMI LAN (X7DCT-LF/-3F/-3IBXF) Gb_LAN1 Gb_LAN2...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Front Control Panel JF1 contains header pins for various buttons and indicators that are normally lo- cated on a control panel at the front of the chassis. These connectors are designed specifi cally for use with Supermicro server chassis. See the fi gure below for the descriptions of the various control panel buttons and LED indicators.
15 and 16 of JF1. Refer to the 3.3 Vcc table on the right for pin defi nitions. Power On Indicator A. NMI Ground B. PWR LED 3.3Vcc Power LED X7DCT-L Rev. 1.2 HDD LED 3.3Vcc 3.3Vsb NIC1 LED 3.3Vsb NIC2 LED 3.3Vcc...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual HDD LED The HDD LED connection is located HDD/UID LED on pins 13 and 14 of JF1. Attach a Pin Defi nitions (JF1) hard drive LED cable here to display Pin# Defi nition disk activity. See the table on the right 3.3 Vcc...
5 Vcc tions. PWR Fail Indicator A. OH/Fan Fail LED B. PWR Supply Fail Ground 3.3Vcc Power LED X7DCT-L Rev. 1.2 HDD LED 3.3Vcc 3.3Vsb NIC1 LED 3.3Vsb NIC2 LED 3.3Vcc...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Reset Button Reset Button The Reset Button connection is located Pin Defi nitions (JF1) on pins 3 and 4 of JF1. Attach it to the Pin# Defi nition hardware reset switch on the computer Reset Signal case. Refer to the table on the right for Ground pin defi...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual 4-pin Auxiliary Power Connector In addition to two 20-pin power connec- tors, a 4-pin 12V PWR supply is located 4-Pin Power at JP10 on the motherboard. This power Pin Defi nitions connector is used to provide power sup- Pin # Defi...
Chapter 2: Installation Fan Headers The X7DCT-L/X7DCT-LF/X7DCT-3/ Fan Header X7DCT-3F/X7DCT-3IBXF has three Pin Defi nitions system fan headers (Fans 1~Fan 3). All Pin# Defi nition these fans are 4-pin fans. See the table Ground on the right for pin defi nitions.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual GLAN 1/2 (Giga-bit Ethernet Ports) Two Gigabit Ethernet ports are located at JLAN1/JLAN2 on the I/O back- GLAN1/2 plane. These ports are supported by the Intel ICH9R chip and accept RJ45 type cables. IPMI LAN Port (X7DCT-LF/-...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Internal Buzzer Internal Buzzer (SP1) Pin Defi nitions The Internal Buzzer, located at SP1, Pin# Defi nitions can be used to provide audible alarms Pin 1 Pos. (+) Beep In for various beep codes. See the table Pin 2 Neg.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Jumper Settings Explanation of Jumpers Connector To modify the operation of the mother- Pins board, jumpers can be used to choose between optional settings. Jumpers cre- ate shorts between two pins to change Jumper the function of the connector. Pin 1 is identifi...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual SAS Enable/Disable (X7DCT-3/-3F/- SAS Enable/Disable Jumper 3IBX only) Settings (JPS1) JPS1 allows the user to enable or disable Both Jumpers Defi nition SAS connections. The default position is Pins 1-2 Enabled (Default) on pins 1 and 2 to enable SAS connec-...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual BMC IPMI Enable (X7DCT-3IBXF) JPB allows the user to enable or disable BMC IPMI Enable/Disable BMC (Baseboard Management Control) Jumper Settings Chip and the onboard IPMI connections. Settings Defi nition This jumper is to be used together with the...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual Infi niBand LED Indicators (X7DCT- Infi niBand Link LED (LED1) 3IBXF only) Settings Color Status Defi nition Two InfiniBand LED Indicators (LED1/ Green Solid Infi niBand LED2) are located on the motherboard. Connected The green LED (LED1) shows the connec- No connection tivity of IB;...
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual UID LED A UID (Unit Identifi cation) LED Indicator UID LED (LED8) Settings is located at LED9 on the motherboard. Color Status Defi nition When this LED is blinking, it indicates the Blue Blink- Unit Identifi ed unit searched for is identifi...
Four Serial_Link connections are confi gured as Pin# Signal four Serial ATA (SATA) connectors (I-SATA 0~3) Ground on the X7DCT-L/-LF. Serial Link connections SATA_TXP provide faster data transmission than those of SATA_TXN the traditional Parallel ATA. These SATA connec- Ground tors are supported by the Intel ICH9R.
Chapter 3: Troubleshooting Chapter 3 Troubleshooting Troubleshooting Procedures Use the following procedures to troubleshoot your system. If you have followed all of the procedures below and still need assistance, refer to the ‘Technical Support Procedures’ and/or ‘Returning Merchandise for Service’ section(s) in this chapter. Note: Always disconnect the power cord before adding, changing or installing any hardware components.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual No Video If the power is on, and you have no video, please remove all the add-on cards and cables. Use the speaker to determine if any beep codes exist. Refer to the Appendix for details on beep codes.
Question: What are the various types of memory that my motherboard can support? Answer: The X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF has six 240-pin DIMM slots that support DDR2 Registered ECC 667/533 SDRAM modules. It is strongly recommended that you do not mix memory modules of different speeds and sizes.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual BIOS before downloading. You can choose from the zip fi le and the .exe fi le. If you choose the zip BIOS fi le, please unzip the BIOS fi le onto a bootable device or a USB pen. Run the batch fi le using the format fl ash.bat fi lename.rom from your bootable device or USB pen to fl...
Chapter 4 BIOS Introduction This chapter describes the Phoenix BIOS™ Setup utility for the X7DCT-L/X7DCT-3/ X7DCT-IBX/X7DCT-3IBX. The Phoenix ROM BIOS is stored in a fl ash chip and can be easily upgraded using a fl oppy disk-based program. Note: Due to periodic changes to the BIOS, some settings may have been added or deleted and might not yet be recorded in this manual.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Running Setup Default settings are in bold text unless otherwise noted. The BIOS setup options described in this section are selected by choosing the ap- propriate text from the main BIOS Setup screen. All displayed text is described in this section although the screen display is often all you need to understand how to set the options as shown on the following page.
Chapter 4: BIOS Main BIOS Setup Menu Main Setup Features System Time To set the system date and time, key in the correct information in the appropriate fi elds. Then press the <Enter> key to save the data. System Date Using the arrow keys, highlight the month, day and year fi...
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X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual LBA Format The following items will be displayed by the BIOS: Total Sectors: This item displays the number of total sectors available in the LBA Format. Maximum Capacity: This item displays the maximum capacity in the LBA Format.
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Chapter 4: BIOS Native IDE Mode. (Note: The Enhanced mode is supported by the Windows 2000 OS or a later version.) When the SATA Controller Mode is set to Enhanced, the following items will dis- play: Serial ATA (SATA) RAID Enable Select Enable to enable Serial ATA RAID Functions.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Advanced Setup Choose Advanced from the Phoenix BIOS Setup Utility menu with the arrow keys. You should see the following display. The items with a triangle beside them have submenus that can be accessed by highlighting the item and pressing <Enter>.
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Chapter 4: BIOS Power Button Behavior If set to Instant-Off, the system will power off immediately as soon as the user hits the power button. If set to 4-sec. Override, the system will power off when the user presses the power button for 4 seconds or longer. The options are instant-off and 4-sec override.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Memory Cache Cache System BIOS Area This setting allows you to designate a reserve area in the system memory to be used as a System BIOS buffer to allow the BIOS to write (cache) its data into this reserved memory area.
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Chapter 4: BIOS Cache Extended Memory Area If enabled, this feature allows the data stored in the extended memory area to be cached (written) into a buffer, a storage area in the Static DROM (SDROM) or written into L1, L2, L3 cache inside the CPU to speed up CPU operations. Select Uncached to disable this function.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Enable Master This setting allows you to enable the selected device as the PCI bus master. The options are Enabled and Disabled. Latency Timer This setting allows you to set the clock rate for the Bus Master. A high-priority, high-throughout device may benefi...
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Chapter 4: BIOS 4GB PCI Hole Granularity This feature allows you to select the granularity of a PCI hole for PCI slots. If MTRRs are not enough, this option may be used to reduce MTRR occupation. The options are: 256 MB, 512 MB, 1GB and 2GB. Channel 0 Rank Sparing/Channel 1 Rank Sparing Select Enable to enable memory sparing for Memory Bus Branch 0 or Branch 1.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Advanced Processor Options Access the submenu to make changes to the following settings. CPU Speed This is a display that indicates the speed of the installed processor. Frequency Ratio (Available when supported by the CPU.) The feature allows the user to set the internal frequency multiplier for the CPU. The options are: Default, x6, x7, x8, and x9.
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Chapter 4: BIOS Adjacent Cache Line Prefetch (Available when supported by the CPU.) The CPU fetches the cache line for 64 bytes if this option is set to Disabled. The CPU fetches both cache lines for 128 bytes as comprised if Enabled. The options are Disabled and Enabled.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual DCA Delay Clocks (Available when supported by the CPU.) This feature allows the user to set the clock delay setting from snoop to prefetch for Direct Cache Access. Select a setting from 8 (bus cycles) to 120 (bus cycles) (in 8-cycle increment).
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Chapter 4: BIOS Mark DMI Events as Read Highlight this item and press <Enter> to mark the DMI events as read. Clear All DMI Event Logs Select Yes and press <Enter> to clear all DMI event logs. The options are Yes and No.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Console Redirection Access the submenu to make changes to the following settings. COM Port Address This item allows you to specify which COM port to direct the remote console to: Onboard COM A or Onboard COM B. The options are COM A, COM B and Dis- abled.
The following items will be monitored and displayed: VcoreA, VcoreB, 12V, 1.8V, 5V, +3.3V, +3.3Vsb, and Vbatt. Note: In the Windows OS environment, the Supero Doctor III settings take precedence over the BIOS settings. When fi rst installed, Supero Doctor III adopts the temperature threshold settings previously set in the BIOS.
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X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual IPMI (The option is available only when an IPMI card is installed in the system available for X7DCT-LF/3F/IBXF Only) IPMI Specifi cation Version: This item displays the current IPMI Version. Firmware Version: This item displays the current Firmware Version.
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Chapter 4: BIOS BIOS POST Watch Dog Set to Enabled to enable POST Watch Dog. The options are Enabled and Disabled. OS Boot Watch Dog Select Enabled to enable the function of OS Boot Watch Dog. The options are Enabled and Disabled. Timer for Loading OS (Minutes) This feature allows the user to set the time value (in minutes) for the previous item: OS Boot Watch Dog by keying-in a desired number in the blank.
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X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Realtime Sensor Data This feature display information from motherboard sensors, such as tempera- tures, fan speeds and voltages of various components. IPMI LAN Confi guration The following features allow the user to confi gure and monitor IPMI LAN settings.
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Chapter 4: BIOS VLAN Tagging Select Enabled to enable Virtual LAN(s) for IPMI connections and allow the user to confi gure VLAN settings. The options are Enabled and Disabled. VLAN ID If VLAN Tagging above is set to Enabled, this item allows the user to change the VLAN ID.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Security Choose Security from the Phoenix BIOS Setup Utility main menu with the arrow keys. You should see the following display. Security setting options are displayed by highlighting the setting using the arrow keys and pressing <Enter>. All Security BIOS settings are described in this section.
Chapter 4: BIOS Password on Boot This setting allows you to determine if a password is required for a user to enter the system at system boot. The options are Enabled (password required) and Disabled (password not required). Boot Choose Boot from the Phoenix BIOS Setup Utility main menu with the arrow keys. You should see the following display.
X7DCT-L/X7DCT-3/X7DCT-IBX/X7DCT-3IBX User's Manual Exit Choose Exit from the Phoenix BIOS Setup Utility main menu with the arrow keys. You should see the following display. All Exit BIOS settings are described in this section. Exit Saving Changes Highlight this item and hit <Enter> to save any changes you have made and to exit the BIOS Setup utility.
Appendix A: BIOS POST Error Codes Appendix A BIOS POST Error Codes This section lists Recoverable POST (Power On Self Test) Error codes for the Phoenix BIOS. Recoverable POST Errors When a recoverable type of error occurs during POST, the BIOS will display a POST code that describes the problem.
Appendix B: Installing the Windows OS Appendix B Installing the Windows OS After all hardware components have been installed, you must fi rst confi gure Intel South Bridge RAID Settings before you install the Windows OS and other software drivers. To confi gure RAID settings, please refer to RAID Confi guration User Guides posted on our web site at www.supermicro.com/support/manuals.
X7DCT-L/X7DCT-LF/X7DCT-3/X7DCT-3F/X7DCT-3IBXF User's Manual B-2 Installing the Windows XP/2003 OS for Systems without RAID Functions Insert Microsoft's Windows XP/2003 Setup CD in the CD Driver, and the system will start booting up from CD. Continue with the OS installation. The Windows OS Setup screen will display.
Appendix C: Installing Other Software Programs and Drivers Appendix C Installing Other Software Programs and Drivers C-1 Installing Other Drivers After you've installed the Windows Operating System, a screen as shown below will appear. You are ready to install software programs and drivers that have not yet been installed.
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The Supero Doctor III program is a Web-based management tool that supports remote management capability. It includes Remote and Local Management tools. The local management is called the SD III Client. The Supero Doctor III program included on the CDROM that came with your motherboard allows you to monitor the environment and operations of your system.
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Appendix C: Installing Other Software Programs and Drivers Supero Doctor III Interface Display Screen-II (Remote Control) Note: SD III Software can be downloaded from our Web site at: ftp://ftp. supermicro.com/utility/Supero_Doctor_III/. You can also download SDIII User's Guide at: http://www.supermicro.com/PRODUCT/Manuals/SDIII/ UserGuide.pdf. For the Linux OS, we will still recommend that you use...
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(Disclaimer Continued) The products sold by Supermicro are not intended for and will not be used in life support systems, medical equipment, nuclear facilities or systems, aircraft, aircraft devices, aircraft/emergency communication devices or other critical systems whose failure to perform be reasonably expected to result in signifi cant injury or loss of life or catastrophic property damage.