Lenovo ThinkSystem SR670 V2 - Page 321

Step 3. Disconnect the sideband cable from both power distribution boards.
Figure 249. Disconnecting the sideband cable
Step 4. Remove the SXM GPU power distribution board.
a.
Unfasten the four screws that secure the SXM GPU power distribution board to the PSU
bays.
Chapter 4. Hardware replacement procedures 313