Czapa wrote on 2020-06-05, 13:54:

You are right however i received this computer from a guy who install system and did this oc. Everything was fine, i was using it for about 3 weeks. Problems started when i was trying to update drivers.
I'm going to stick with standard 166 MHz.

I understand . Strange that it worked well for 3 weeks . Good that it is solved now .