Hello,
I can confirm that so far every similar issue I had on 380G6/g7 has been related to the processor socket.
But think more broadly, when "bent pin" is mentioned.
I just (30 minutes ago) had the case that when upgrading CPUs on a DL380 G6 from X5570 to X5670 I got faulty dim socket reports on A,D and G of Proc 1. I was worried that the processor was busted and switched them, but it still was on Proc 1 side.
Then I took a strong light and a magnifying glass and found that two tiny (I'd guess <= 0.3mm) pieces of fluff had lodged onto two of the pins. (Sorry, not a sterile environment here).
Apparently that was enough to either make or block an electrical connection in a way that was not intended. I blew the socket out with air (Giotto Rocket Blower), reseated the CPU. Now memory is fine and the server is currently looping through memory tests without any error or problem.
regards
martin