Lenovo ThinkSystem SR950 Setup Manual page 172

Table 114. I/O tray connectors
Callout
1
Riser for slot 1 to 4 connectors (Riser 1)
2
PCIe3, x16, 75 watt connector (slot 5)
3
PCIe3, x16, 75 watt connector (slot 6)
4
PCIe3, x8, 25 watt connector (slot 7)
5
Signal cable to power backplane
6
Battery (CR2032)
7
ML2 PCIe3, x16 connector (slot 8)
Notes: The following PCIe "slots" are assigned to components elsewhere in the server:
• PCIe slot 18 is assigned to the RAID card in the lower tray.
• PCIe slot 19 is assigned to the RAID card in the upper tray.
• PCIe slot 20 is assigned to the M.2 backplane inside the I/O tray.
I/O tray switches
Two switch blocks are located on the I/O tray
SW1
The switch block SW1 is located near the VGA connector on the I/O tray. All switches in this switch block are
reserverd.
SW2
The switch block SW2 is located near the M2 SATA/PCIe backbplane connector.
Table 115 "SW2 switch block definition" on page 168 describes the functions of the switch block.
Table 115. SW2 switch block definition
Default position
Switch number
1 Off
2 Off
3 Off
4
Off
5
Off
6 Off
168
ThinkSystem SR950 Setup Guide
Callout
8
Network (LOM) connector (slot 9)
9
TCM connector (see
ThinkSystem SR950 Maintenance Manual
10
Riser for slot 10 to 15 connectors (Riser 2)
11
M.2 SATA/PCIe (Hypervisor) backplane connector
(see note following this table)
12
Riser for PCIe slot 16 and 17 (Riser 3)
13
SW2 - Switch block 2
14
SW1 - Switch block 1
Note: This switch block is reserved.
Description
TPM/TCM physical presence.
Reserved.
Reserved.
Clear CMOS memory. When this switch is toggled to ON, it clears
the data in CMOS memory, which clears the power-on password.
Force UEFI recovery. Changing the position of the switch to ON will
force the system to boot from the recovery UEFI image.
Force XCC backup bank. Changing the position of the switch to ON
will force the system to boot from the backup XCC bank.
"Enable TPM/TCM" in the Lenovo
)