Four-Socket Upgradable - Lenovo ThinkSystem SR950 Setup Manual

Four-socket performance / storage rich, four processors
This configuration comes with four processors, requires at least two 1100/1600-watt PSUs, and supports up
to:
• 48 memory modules.
• 13 rear PCIe slots.
See the following tables for the location of the supported components.
Table 13. Location of the four processors and 48 supported memory module slots (viewed from the front)
CPU 3 and DIMM 25-36
CPU 1 and DIMM 1-12
Table 14. Location of the 13 supported PCIe slots (viewed from the rear)
PCIe 1
PCIe 2
PCIe 3
PCIe 4
PCIe 5

Four-socket upgradable

These configurations allow a simple upgrade to eight-socket configurations in the future, while support up to
12 drives and 15 rear PCIe slots. The upper tray slot requires a upper tray filler.
The four-socket upgradable configurations support two or four processors with the following requirements/
capabilities:
• Only 8100 series processors are supported.
• Fan 1 to 6 are required to be installed.
• The upper tray filler is installed in the upper tray bay.
• Up to 12 drives (bay 0-11) are supported.
See the following for the support variations depending on number of processors that are installed:
• "Four-socket upgradable, two processors" on page 17
• "Four-socket upgradable, four processors" on page 17
Notes:
• When four processors are installed, they must be configured in a ring topology.
• These configurations allow a simple upgrade to 8-socket ones. See "Eight-socket storage rich" on page
19 for details about 8-socket configurations.
4. This slot is blank if a 2 x16 riser is installed.
16
ThinkSystem SR950 Setup Guide
Upper tray filler
4
4
PCIe 6 PCIe 7
CPU 4 and DIMM 37-48
CPU 2 and DIMM 13-24
PCIe 10
PCIe 11
PCIe 12
PCIe 13
PCIe 8 PCIe 9
(ML2) (LOM)