Hi Elidon,
i chatted with HP Support this morning and they told me to:
- install the NC523SFP in the PCI-E riser slot 2 instead of slot 1 (slot 1 is near to mainboard)
- change thermal configuration in RBSU from "Optimal Cooling" to "Increased Cooling"
My DL380G6 + MSA2040 are connected from this morning without problems, i will monitor the situation in the next days.
Bye