I'm having the same issue with my i7-4770k. I'm running Prime95 torture tests without errors or warnings on low 50°C temps (liquid cooling).
My eventlog is swamped with these errors though. Could this be caused by VirtualBox? I'm running around 6 to 8 VMs at any given time.
Even though I have a K-cpu, nothing is overclocked at the time, all in standard trim. It's a pretty new CPU though and I'd like to know if I should ask for a replacement (HW issue with CPU) or not.