RAM Memory issue?/P8Z77V-Deluxe

[perseid]

Hi all, I encountered today a weird situation. As usual I left my PC on and when I returned there was no screen image and the mobo (P8Z77V-Deluxe) was showing error code 55 (no memory installed) with the red light turned on continuously. So I pressed the MemReset mobo button but that did not help. I powered off the PC, made sure the ram modules were not loose and powered on again, and the system was able to at least show the BIOS screen with the message "overclocking conflict" (however I never overclocked, only applied default OC). I pressed F2, entered BIOS and reset to default values and now everything is fine.
Is this a sign of a failing RAM? Or is this normal? My system has been running stable for over a year in almost 24/7 operation. Thanks.

[HiVizMan]

As time passes so components will have some wear and minor degradation. Or, as time passed the mounting of your CPU cooler or other bits and pieces shifted and loosened. I can not say one way or another but yes it does happen.

I have no idea what you mean by default OC so could you expand what you mean there please.