System Board Layout - Dell OptiPlex 5055 Small Form Factor Owner's Manual

b memory module
c heat sink assembly
d SD card
e M.2 PCIe SSD
f processor
g cooling shroud
h optical drive
i 2.5 inch hard drive assembly
j front bezel
k cover
8 Follow the procedure in

System board layout

This chapter explains about the motherboard's layout with name and location of its connectors.
1 PCI-e x16 Connector (SLOT2)
3 VGA Daughter Board Connector (VGA)
5 CPU Power Connector (ATX_CPU)
7 CPU fan Connector (FAN_CPU)
9 M.2 Slot 3 Connector (M.2_SSD)
11 Media Card Reader Connector (CARD_READER)
After working inside your computer.
2 PCI-e x4 Connector (SLOT1) - open ended X4 to support
X16
4 Processor Socket (CPU)
6 Intrusion Switch Connector (INTRUDER)
8 Memory Slots (DIMM1,DIMM2,DIMM3,DIMM4)
10 Power Switch Connector (PWR_SW)
12 System fan Connector (FAN_SYS)
Disassembly and reassembly 41