Lenovo ThinkSystem SR650 Maintenance Manual page 28

• Do not install PCIe adapters with small form factor (SFF) connectors in PCIe slot 6.
• Observe the following PCIe slot selection priority when installing an Ethernet adapter or a converged
network adapter:
Number of installed processors
One processor
Two processors
PCIe slots 1, 2, and 3 on riser 1:
There are four different riser cards that can be installed in riser 1.
• Type 1
– Slot 1: PCIe x16 (x8, x4, x1), full-height, half-length
– Slot 2: PCIe x16 (x8, x4, x1), full-height, half-length
– Slot 3: PCIe x16 (x8, x4, x1), full-height, half-length
• Type 2
– Slot 1: PCIe x16 (x8, x4, x1), full-height, half-length
– Slot 2: PCIe x16 (x8, x4, x1), full-height, half-length
– Slot 3: ML2 x8 (x8, x4, x1), full-height, half-length
• Type 3
– Slot 1: PCIe x16 (x16, x8, x4, x1), full-height, half-length
– Slot 2: Not available
– Slot 3: PCIe x16 (x8, x4, x1), full-height, half-length
• Type 4
– Slot 1: PCIe x16 (x8, x4, x1), full-height, half-length
– Slot 2: Not available
– Slot 3: ML2 x16 (x16, x8, x4, x1), full-height, half-length
PCIe slot 4 on the system board: PCIe x8 (x8, x1), low-profile
PCIe slots 5 and 6 on riser 2:
• Slot 5: PCIe x16 (x16, x8, x4, x1), full-height, half-length
• Slot 6: PCIe x16 (x16, x8, x4, x1), full-height, half-length
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Rear 3.5-inch drive bays (2)
Used to install up to two 3.5-inch hot-swap drives on the rear of the server. The rear 3.5-inch drive bays are
available on some models.
The number of the installed drives in your server varies by model. The EMI integrity and cooling of the server
are protected by having all drive bays occupied. The vacant drive bays must be occupied by drive bay fillers
or drive fillers.
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ThinkSystem SR650 Maintenance Manual
PCIe slot selection priority
4, 2, 3, 1
4, 2, 6, 3, 5, 1