POST Error: 210 - Quick Path Interconnect (QPI) Link Degradation. A QPI link is operating in a degraded performance state
DEVICE : HP ProLiant DL580 G7 ERROR : POST Error: 210 - Quick Path Interconnect (QPI) Link Degradation. A QPI link is operating in a degraded performance state CAUSE : Contamination under one of the CPUs: A flake of dry thermal paste NOTE : I was unable to find references of "POST Error: 210" in the DL580G7 documentation. SOLUTION : Removed the CPUs one by one. Inspected the sockets and cleaned if necessary using a small needle and steady hand, under magnification Cleaned the CPU contacts thoroughly with one drop of 99.8% isopropyl alcohol and a lint free cloth (Please, don't use paper!)