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Front + rear backplanes: 24 x NVMe + 4 x NVMe

This section provides cable routing information for the 24 x NVMe (Gen 4) + 4 x NVMe configuration with two retimer cards.

Connections between connectors: 11, 22, 33, ... nn

Front backplane cable routing

Figure 1. NVMe cable routing to onboard connectors and retimer
NVMe cable routing to onboard connectors and retimer

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

Rear backplane cable routing

Figure 2. Rear backplane cable routing
Rear backplane cable routing

FromTo
1 Backplane 4: NVMe 0-1Retimer: C0
2 Backplane 4: NVMe 2-3Retimer: C1
3 Backplane 4: PWR4 Onboard: 7mm power connector