Riser 5 + OCP interposer cards + Retimer cards

The following shows the cable connections for the 16 x 2.5-inch NVMe (Gen 4) configuration with riser 5, front and rear OCP interposer cards, and two retimer cards.

To connect cables to the riser 5 card and OCP interposer cards, see Riser 5 card + OCP interposer cards.

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

Figure 1. Backplane cable routing

From	To
1 Backplane 1: NVMe 0-1	Onboard: PCIe 10
2 Backplane 1: NVMe 2-3	Onboard: PCIe 9
3 Backplane 1: NVMe 4-5	Onboard: PCIe 8
4 Backplane 1: NVMe 6-7	Onboard: PCIe 7
5 Backplane 2: NVMe 0-1	Retimer: C0
6 Backplane 2: NVMe 2-3	Retimer: C1
7 Backplane 2: NVMe 4-5, 6-7	Retimer: C0, C1