Table 3. PCIe slot-to-processor mapping
PCIe Slot
Processor (Riser if the mapping changes for different risers)
1, 2
• 4 (4 x8)
• 8 (6 x16)
3, 4
• 4 (4 x8)
• 4 (2 x16)
• 6 (6 x16)
5, 6 2
7, 8, 9 1
10, 11
• 3 (4 x8)
• 7 (6 x16)
12, 13
• 3 (4 x8)
• 5 (6 x16)
14, 15, 16 3
17 1
Configurations
The ThinkSystem SR950 is available in several configurations.
Four-socket performance
These configurations meet the expectations of high-performance and low costs, while support up to 12
drives and 15 rear PCIe slots.
The four-socket performance configurations support two to four processors with the following requirements/
capabilities:
• Fan 1 to 6 are required to be installed.
• The upper tray filler is installed in the upper tray slot.
• 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 performance, two processors” on page 12
• “Four-socket performance, three processors” on page 12
• “Four-socket performance, four processors” on page 13
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 tray filler, and could be upgraded to eight-socket ones, but it
requires the 4S-to-8S Upgrade Option kit, additional components, and Lenovo hardware installation.
Chapter 1. Introduction 11
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