Lenovo ThinkSystem SR950, Setup Manual, Page: 9 / 390

Table 1. Server Specifications (continued)
Specification Description
Drive expansion
• Up to six SAS/SATA/NVMe drive backplanes:
• Up to 24 2.5-inch hot-swap drive bays:
– Up to 24 SATA/SAS drives (dependent on installed drive backplanes)
– Up to 12 NVMe drives (dependent on installed drive backplanes)
See “Configurations” on page 11 for more details.
Expansion slots Up to seventeen expansion slots (dependent on server configuration):
• Slot 1 - 4: PCI Express 3.0 for PCIe riser-card with the following slots available
depending on the riser installed:
1. x8/x8/x8/x8 PCIe full-height riser kit provides:
– Slot 1: PCI Express 3.0 x8
– Slot 2: PCI Express 3.0 x8
– Slot 3: PCI Express 3.0 x8
– Slot 4: PCI Express 3.0 x8
2. x16/x16 PCIe full-height riser kit provides:
– Slot 3: PCI Express 3.0 x16
– Slot 4: PCI Express 3.0 x16
3. x16/x16/x16/x16 PCIe full-height riser kit (8-processor systems only)
provides:
– Slot 1: PCI Express 3.0 x16
– Slot 2: PCI Express 3.0 x16
– Slot 3: PCI Express 3.0 x16
– Slot 4: PCI Express 3.0 x16
• Slot 5: PCI Express 3.0 x16 (low profile)
• Slot 6: PCI Express 3.0 x16 (low profile)
• Slot 7: PCI Express 3.0 x8 (low profile)
Note:
You should not install a RAID or Host Bus Adapter card in this slot.
• Slot 8: ML2 x16 network adapter (with NC-SI support)
• Slot 9: LOM adapter
• Slot 10 - 15: PCI Express 3.0 for PCIe riser-card with the following slots available
depending on the riser-card installed:
1. x8/x8/x8/x8 PCIe full-height riser kit provides:
– Slot 10: PCI Express 3.0 x8
– Slot 11: PCI Express 3.0 x8
– Slot 12: PCI Express 3.0 x8
– Slot 13: PCI Express 3.0 x8
2. x16/x16 PCIe full-height riser kit provides:
– Slot 12: PCI Express 3.0 x16
– Slot 13: PCI Express 3.0 x16
3. x16/x16/x16/x16 PCIe and ML2 x16 full-height riser kit (8-processor systems
only) provides:
– Slot 10: PCI Express 3.0 x16
Chapter 1
.
Introduction
5