Dell PowerEdge 1850 - Manual (Page 4)

Table A-2. System Board Connectors
Riser Board Connectors
See Figure A -4 , Figure A -5 , and Figure A -6 for the location and description of the riser card connectors.
Figure A-4. Standard PCI-X Riser Card
Figure A-5. Optional ROMB PCI-X Riser Card (when available)
Connector Description
BATTERY Connector for the 3.0 V coin battery
DIMMn_ x Memory module connector (6)
FAN_1U_n Fan module power connector (4)
PROC_n Processor connector (2)
PSUn_CONN Power supply connector (2)
RAC_CONN Connector for the remote access controller (RAC)
RAID_KEY Connector for the optional RAID key