12 x 3.5" SAS/SATA + 4 x 3.5" SAS/SATA + 4 x 2.5" NVMe

This topic provides cable routing information for the 12 x 3.5-inch SAS/SATA front backplane with a 4 x 3.5-inch SAS/SATA middle backplane and a 4 x 2.5-inch NVMe rear backplane.

16i RAID/HBA adapter​

Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n

Figure 1. Front/Middle backplane signal cable routing		Figure 2. Middle backplane power cable routing
From	To	From	To
1 Backplane 1: SAS 0, SAS 1	16i adapter Gen 4: C0 Gen 3: C0C1	1 Backplane 5: PWR	Onboard: GPU power Onboard: backplane power Onboard: backplane sideband
2 Backplane 1: SAS 2 Backplane 5: SAS	Gen 4: C1 Gen 3: C2C3

Figure 3. Rear backplane cable routing

From	To
1 Backplane 4: NVMe 0-1	Onboard: PCIe 9
2 Backplane 4: NVMe 2-3	Onboard: PCIe 10
3 Backplane 4: PWR	Onboard: 7mm power connector