Onboard connectors
The following shows the cable connections for the 8 x 2.5-inch SAS/SATA configuration with onboard 
connectors.
To connect riser 3 and riser 4 cables when two processors are installed, see 
“Riser 3/4 cage” on page 306.
To connect riser 5 cables when two processors are installed, see 
“Riser 5 cage” on page 309.
Connections between connectors: 
1  ↔  1 ,  2  ↔  2 ,  3  ↔  3 , ...  n  ↔  n
Figure 295. Cable routing when two processors installed Figure 296. Cable routing when one processor installed
From To From To
1  Backplane 1: SAS 1  Onboard: PCIe 7 1  Backplane 1: SAS 1  Onboard: PCIe 9
8i/16i RAID/HBA adapter
The following shows the cable connections for the 8 x 2.5-inch SAS/SATA configuration with one 8i/16i 
RAID/HBA adapter.
To connect riser 3 and riser 4 cables, see 
“Riser 3/4 cage” on page 306.
To connect riser 5 cables, see 
“Riser 5 cage” on page 309.
To connect cables to the front and rear OCP interposer cards, see 
“OCP interposer cards” on page 297.
Connections between connectors: 
1  ↔  1 ,  2  ↔  2 ,  3  ↔  3 , ...  n  ↔  n
314 ThinkSystem SR665 V3 User Guide