When the server undergoes a reset because of a CPU accessing memory from an uncorrectable DIMM, a reboot or warm reset from the server might result in an unspecified CPU fault. This has been observed with Windows 2008 R2 SP1 and Windows 2008 SP2.
The sequence of events is:
CPU accesses memory from an uncorrectable ECC DIMM.
As a result, the CPU initiates a platform reset.
The next reset results in a valid DIMM fault.
When the DIMMs are not replaced and the system continues to operate with the fault, a subsequent reboot or warm reset results in processors faults. However, these are false processor faults
Workaround
Ignore these false processor faults when they're associated with a uncorrectable DIMM reset.
Handle the DIMM errors like you would any other DIMM error, and clear the DIMM faults.
Clear the processor faults.
Power-cycle the server.
For example, in the Oracle ILOM Remote Power Control tab, select Power Cycle or Immediate Power Off.