When I saw this happen it was bad memory. The CPU & ECC got involved to fix it
OK in my case

YMMV

Wilko

> My Alpha 433au occaisionally gets the message:
> WARNING:  too many Processor corrected errors detected on cpu 0.  Reporting
> Suspended.
> 
> Within 1 to 48 hours the system will crash reporting:
> 
> Machine check Processor Fatal Abort
> Maching check code = 98
> Processor detected hard error.
> 
> Does the MC code 98 indicate what piece of hardware is failing?
>