Question I got the error message “IERR Asserted” when I boot up my motherboard X9DRW-IF. I already updated my BIOS and IPMI firmware rev. What is the root cause? Answer IERR is a Processor Internal Error, a signal that indicates a Processor unrecoverable error or even a non-CPU event, such as a System BUS interruption or a memory can start this signal. On an Intel® Server Board, a Processor IERR can be confirmed or discarded by running a CPU Retest from the BIOS (Basic Input Output System) Setup Utility. In some cases a system restart can also eliminate an IERR but if the problem persists please try to boot up the system with one processor at the time, test another processor if possible and remove and reinstall the memory. The IERR Filtering Algorithm helps to determine if the IERR signal came from a false CPU internal error or from another hardware source; preventing unnecessary processor replacements and at the same time helps to isolate IERR events. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) L U 3 U FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 14686 N/A 08/13/12 JL     Print Answer