Dell PowerEdge 750 - Manual (Page 4)

Riser Board Connectors
See Figure A -4 and Table A -3 for the location and description of the backplane board connectors.
Figure A-4. Riser Board Connectors
Table A-3. Riser Board Connectors
Disabling a Forgotten Password
The system's software security features include a system password and a setup password, which are discussed in detail in "Using the System Setup Program"
in your User's Guide. The password jumper enables these password features or disables them and clears any password(s) currently in use.
1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2. Open the system. See " Opening the System " in "Troubleshooting Your System."
3. Remove the password jumper plug.
See Figure A -2 to locate the password jumper on the system board.
4. Close the system. See " Closing the System " in "Troubleshooting Your System."
5. Reconnect the system to the electrical outlet, and turn on the system.
BT1 Connector for the 3.0 V coin battery
CN2 12 V and 3.3 V power connector for the system board
CN3 +5 V and -12 V power connector for the system board
CN4 Daughter card connector (not supported)
DIMMn_ x Memory modules (4)
J7 Control panel interface connector
Sys_Mgmt Connector for the remote access controller (RAC)
Fan Power connector for the fan assembly
Pri-IDE CD drive interface connector
SATA_PORT_n Connectors for the SATA hard drives
SLT1 Riser board interface connector
Connector Description
Upper slot PCI 32-bit, 33 MHz (5V) The RAC must be installed in the upper slot.
Lower slot PCI-X 64-bit, 66 MHz (3.3V) For optimal performance, install RAID and SCSI controllers in the lower slot.
System board System board interface connector.
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.