Lenovo ThinkSystem SR850 Maintenance Manual page 26

Table 7. Components on the server rear view (continued)
3
M.2 backplane (slot 6, internal)
4
LOM adapter (slot 7)
5
AC power LED (green)
6
DC power LED (green)
7
Power supply error LED (yellow)
8
Power supply unit 2
9
Power supply unit 1
1 PCIe slots (slot 1-2, 8-11):
Install PCIe adapters into these slots. Following are detailed descriptions of each slot:
• Slot 1: PCI Express 3.0 x16 (supports PCIe switch card)
• Slot 2: PCI Express 3.0 x8 (supports RAID adapters for SATA/SAS drives)
• Slot 8: PCI Express 3.0 x8
• Slot 9: PCI Express 3.0 x8
• Slot 10: PCI Express 3.0 x8 (supports RAID adapters for SATA/SAS drives)
• Slot 11: PCI Express 3.0 x16 (supports PCIe switch card)
For more information, see "System-board connectors" on page 21 for the location of the slots, and "PCIe
riser-card assembly and adapter replacement" on page 86 for information about installation and removal.
2 PCIe riser-card (slot 3-5):
Install a full-height PCIe riser-card into this slot. Following are the PCIe riser-cards supported by this server.
• x8/x8/x8 PCIe full-height riser assembly provides:
– Slot 3: PCI Express 3.0 x8
– Slot 4: PCI Express 3.0 x8
– Slot 5: PCI Express 3.0 x8
• x8/x8/x8ML2 PCIe full-height riser assembly provides:
– Slot 3: PCI Express 3.0 x8
– Slot 4: PCI Express 3.0 x8
– Slot 5: Customized slot for x16 ML2 adapter
• x8/x16ML PCIe full-height riser assembly provides:
– Slot 3: PCI Express 3.0 x8
– Slot 4: Not available
– Slot 5: Customized slot for ML2 adapter
3 M.2 backplane (slot 6):
Install M.2 backplane to this slot. See "M.2 drive and backplane replacement" on page 74 for more details.
4 LOM adapter (slot 7):
18
ThinkSystem SR850 Maintenance Manual
12
Identification LED (blue)
13
USB 4 (USB 3.0)
14
USB 3 (USB 3.0)
15
Serial connector
16
VGA connector
17
XClarity Controller network connector
18
NMI button