How did you reach the situation where the solution was soldering a clothes hanger to a board for pcie ???
Putting shirts directly onto the board creates heating issues
We were seeing some issues, one engineer was blaming signal integrity issues, we didn't have access to a high enough speed oscope to get a clean eye diagram, and so another engineer literally disappeared for an hour and had the boards running over the clothes hangars on the old firmware to say, no, it's not a questionable signal integrity issue, go back and fix your code.