Onboard connectors

The following shows the cable connections for the front 12 x 3.5-inch SAS/SATA + middle 4 x 3.5-inch SAS/SATA + rear 4 x 3.5-inch SAS/SATA configuration with onboard connectors.

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

图 1. Front/Middle/Rear backplane signal cable routing		图 2. Middle/Rear backplane power cable routing
From	To	From	To
1 Backplane 1: SAS 0 Backplane 4: SAS	1 Onboard: PCIe 5	1 Backplane 5: PWR	1 Onboard: GPU power Rear backplane power Rear backplane sideband
2 Backplane 1: SAS 1, SAS 2	2 Onboard: PCIe 9	2 Backplane 4: PWR	2 Riser 2: PWR1, PWR2
3 Backplane 5: SAS	3 Onboard: PCIe 7