Lenovo ThinkSystem SR950 Setup Manual page 36

Table 31. Components on the rear of the server (continued)
Callout
PCIe slot 12 (on riser 2)
12
PCIe slot 13 (on riser 2)
13
PCIe slot 14 (on riser 2)
14
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.
1 2 3 4 PCIe slot 1-4 (on riser 1)
Install PCIe adapters into these slots.
5 6 7 PCIe slot 5-7
Install PCIe adapters into these slots.
8 ML2 x16 network adapter slot
Install ML2 x16 network adapter into this slot.
9 LOM adapter slot
Install LOM adapter into this slot.
10 11 12 13 14 15 PCIe slot 10-15 (on riser 2)
Install PCIe adapters into these slots.
Note: Install ML2 x16 network adapter into PCIe slot 15 (on riser 2).
16 17 PCIe slot 16-17 (on riser 3)
Install PCIe adapters into these slots.
18 19 20 21 Power supply 1-4
Note: Power supply 2-4 are optional.
The hot-swap redundant power supplies help you avoid significant interruption to the operation of the
system when a power supply or an input power source fails. A failed power supply can be replaced without
turning off the server. You can purchase a power supply option from Lenovo and install the power supply to
provide power redundancy or additional power capacity without turning off the server.
For information about minimum power supply requirements and power redundancy, see "power supply
criteria in the "Install a power supply" topic" on page 245.
Each hot-swap power supply has three status LEDs. See "Rear view LEDs" on page 33 for information.
22 NMI button
ThinkSystem SR950 Setup Guide
32
Callout
VGA video port
26
Service only connector
27