Lenovo ThinkSystem SR950 Setup Manual page 18

• "Four-socket performance / storage rich, two processors" on page 14
• "Four-socket performance / storage rich, three processors" on page 14
• "Four-socket performance / storage rich, four processors" on page 15
Notes:
• 5100 series processors are only supported in four-processor configuration in this category.
• For optimal performance, configure four processors in mesh topology.
• These configuration require the upper storage tray, and could be upgraded to eight-socket ones, but it
requires the 4S-to-8S Upgrade Option kit, additional components, and Lenovo hardware installation.
Consider "Four-socket upgradable" on page 15 or "Four-socket upgradable / storage rich" on page 17 for
an easier potential upgrade in the future.
For more information about upgrading to the eight-socket configuration, see the following topic:
http://thinksystem.lenovofiles.com/help/topic/7X12/installing_the_4S-to-8S_upgrade_option.html
Four-socket performance / storage rich, two processors
This configuration comes with two processors, requires at least one 1100/1600-watt PSU, and supports up
to:
• 24 memory modules.
• five rear PCIe slots.
See the following tables for the location of the supported components.
Table 10. Location of the two processors and 24 supported memory module slots (viewed from the front)
Not populated
CPU 1 and DIMM 1-12
Table 11. Location of the five supported PCIe slots (viewed from the rear)
PCIe 5
Four-socket performance / storage rich, three processors
This configuration comes with three processors, requires at least two 1100/1600-watt PSUs, and supports
up to:
• 36 memory modules.
• nine rear PCIe slots.
This configuration comes with three processors, requires nine fans, and supports up to:
See the following tables for the location of the supported components.
ThinkSystem SR950 Setup Guide
14
Upper tray filler
PCIe 6 PCIe 7 PCIe 8
(ML2)
Not populated
CPU 2 and DIMM 13-24
PCIe 9
(LOM)