E3.S backplane cable routing: E3.S chassis without Compute Complex Neptune Core Module

This section provides backplane cable connection information for server models with front E3.S bays and without Compute Complex Neptune Core Module.

Figure 1. E3.S backplane numbering

Supported E3.S configurations

The table below lists the E3.S configurations supported by servers without Compute Complex Neptune Core Module.

1T: E3.S hot-swap drive; 2T: E3.S non-hot-swap CXL memory (CMM)

Figure 2. Power cable connections

Figure 3. Signal cable connections for BP 1/3/5/7

From	To (processor board)	Cable length
`1` BP1: Bay 0, Bay 1 (1T) BP1: Bay 1 (2T)	`1` PCIe 8 (when BP3 is installed) PCIe 6 (when BP3 is not installed)	300 mm
`2` BP1: Bay 2, Bay 3 (1T) BP1: Bay 3 (2T)	`2` PCIe 7 (when BP3 is installed) PCIe 5 (when BP3 is not installed)	300 mm
`3` BP3: Bay 0, Bay 1 (1T) BP3: Bay 1 (2T)	`3` PCIe 6	300 mm
`4` BP3: Bay 2, Bay 3 (1T) BP3: Bay 3 (2T)	`4` PCIe 5	300 mm
`5` BP5: Bay 0, Bay 1 (1T) BP5: Bay 1 (2T)	`5` PCIe 4	300 mm
`6` BP5: Bay 2, Bay 3 (1T) BP5: Bay 3 (2T)	`6` PCIe 3	300 mm
`7` BP7: Bay 0, Bay 1 (1T) BP7: Bay 1 (2T)	`7` PCIe 2	300 mm
`8` BP7: Bay 2, Bay 3 (1T) BP7: Bay 3 (2T)	`8` PCIe 1	300 mm

Figure 4. Signal cable connections for BP 2/4/6/8

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