From To
1  Backplane 5: NVMe 0-1, 2-3
1  Retimer card: C0, C1
2  Backplane 6: NVMe 0-1, 2-3
2  Retimer card: C0, C1
3  
•  Backplane 5: PWR
•  Backplane 6: PWR
3  
•  Onboard: rear backplane power
•  Onboard: rear backplane sideband
•  Riser 1: PWR
One 8 x AnyBay and two 8 x NVMe backplanes
This section provides cable routing information for the server model with one 8 x 2.5-inch AnyBay and two 8 
x 2.5-inch NVMe front backplanes.
To connect power cables for the front backplane(s), refer to 
“Backplanes: server models with 2.5-inch front 
drive bays” on page 312
.
To connect signal cables for the front backplane(s), refer to the following cable routing scenarios depending 
on your server configuration.
• 
“8i RAID/HBA adapter + One retimer card” on page 408
•  “8i RAID/HBA adapter + Three retimer cards” on page 411
8i RAID/HBA adapter + One retimer card
The following shows the cable connection for the front (8 x 2.5-inch AnyBay + 16 x 2.5-inch NVMe) 
configuration with one 8i RAID/HBA adapter and one retimer card.
Connections between connectors: 
1  ↔  1 ,  2  ↔  2 ,  3  ↔  3 , ...  n  ↔  n
408 ThinkSystem SR665 V3 User Guide