Retimer board cable routing

Use this section to understand the cable routing for the retimer board.

Power and sideband cables​

Note

• If necessary, attach the labels to both ends of the cables.
  1. Attach the white space portion of the label to one end of the cable.
  2. Wrap the label around the cable and attach it to the white space portion.
  3. Repeat to attach the other label to the opposite end of the cable.
  Figure 1. Label application
  
  
• Route the cables under the compute tray as illustrated below
• Route the cables through the cable holders and sponges as illustrated below.

Figure 2. Power and sideband cable routing

From	To	Label
1 Retimer board: Power connector	1 Power distribution board: Retimer board power connector	PDB PWR RISER PWR 1A
2 Retimer board: Sideband connector 1	2 Power distribution board: Retimer board sideband connector 1	SB 1
3 Retimer board: Sideband connector 2	3 Power distribution board: Retimer board sideband connector 2	SB 2

Signal cables​

Note

• If necessary, attach the labels to both ends of the cables.
  1. Attach the white space portion of the label to one end of the cable.
  2. Wrap the label around the cable and attach it to the white space portion.
  3. Repeat to attach the other label to the opposite end of the cable.
  Figure 3. Label application
  
  
• Route the cables that connect to MCIO connectors 4A/4B and 8A/8B on the system board under the compute tray as illustrated below.
• Route the cables that connect to MCIO connectors 9A/9B and 7A/7B on the system board over the system board as illustrated below.
• Route the cables through the cable holders and cable guides as illustrated below.

Figure 4. Signal cable routing

From	Label	To	Label
1 Retimer board: MCIO connector D Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO D	1a System board: MCIO connector 4A	P2 - 4A MCIO D
		1b System board: MCIO connector 4B	P3 - 4B MCIO D
2 Retimer board: MCIO connector E Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO E	2a System board: MCIO connector 8A	P2 - 8A MCIO E
		2b System board: MCIO connector 8B	P3 - 8B MCIO E
3 Retimer board: MCIO connector A Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO A	3a System board: MCIO connector 9A	P2 - 9A MCIO A
		3b System board: MCIO connector 9B	P3 - 9B MCIO A
4 Retimer board: MCIO connector B Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO B	4a System board: MCIO connector 1A	P2 - 1A MCIO B
		4b System board: MCIO connector 1B	P3 - 1B MCIO B
5 Retimer board: MCIO connector C Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO C	5a System board: MCIO connector 2A	P2 - 2A MCIO C
		5b System board: MCIO connector 2B	P3 - 2B MCIO C
6 Retimer board: MCIO connector F Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO F	6a System board: MCIO connector 10A	P2 - 10A MCIO F
		6b System board: MCIO connector 10B	P3 - 10B MCIO F
7 Retimer board: MCIO connector G Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO G	7a System board: MCIO connector 5A	P2 - 5A MCIO G
		7b System board: MCIO connector 5B	P3 - 5B MCIO G
8 Retimer board: MCIO connector H Note Cable end P2 plugs into connector A. Cable end P3 plugs into connector B.	MCIO H	8a System board: MCIO connector 7A	P2 - 7A MCIO H
		8b System board: MCIO connector 7B	P3 - 7B MCIO H

GPU management cables​

Note

• If necessary, attach the labels to both ends of the cables.
  1. Attach the white space portion of the label to one end of the cable.
  2. Wrap the label around the cable and attach it to the white space portion.
  3. Repeat to attach the other label to the opposite end of the cable.
  Figure 5. Label application
  
  
• Route the cables over the system board as illustrated below
• Route the cables through the cable holders and cable guide as illustrated below.

Figure 6. GPU management cable routing

From	To	Label
1 Retimer board: EP management connector 1	1 System board: EP management connector 1	EP MGMT 1
2 Retimer board: EP management connector 2	2 System board: EP management connector 2	EP MGMT 2