Lenovo ThinkSystem SR950 Setup Manual page 290

Table 222. I/O tray connectors
Callout
Riser for slot 1 to 4 connectors (Riser 1)
1
PCIe3, x16, 75 watt connector (slot 5)
2
PCIe3, x16, 75 watt connector (slot 6)
3
PCIe3, x8, 25 watt connector (slot 7)
4
Signal cable to power backplane
5
Battery (CR2032)
6
ML2 PCIe3, x16 connector (slot 8)
7
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
reserved.
SW2
The switch block SW2 is located near the M2 SATA/PCIe backbplane connector.
Table 223 "SW2 switch block definition" on page 286 describes the functions of the switch block.
Table 223. SW2 switch block definition
Default position
Switch number
1 Off
2 Off
3 Off
4
Off
5
Off
6 Off
ThinkSystem SR950 Setup Guide
286
Callout
Network (LOM) connector (slot 9)
8
TCM connector (see
9
ThinkSystem SR950 Maintenance Manual
Riser for slot 10 to 15 connectors (Riser 2)
10
M.2 SATA/PCIe (Hypervisor) backplane connector
11
(see note following this table)
Riser for PCIe slot 16 to 17 (Riser 3)
12
SW2 - Switch block 2
13
SW1 - Switch block 1
14
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
)