sometimes that happens .
I have also seen 1080 ti's clock core at 250 for a month then never do over 225 for core on zec .
Since stability is king for me I do zec at 200 and no longer try to go higher.
most of my gear is at the solar array and driving 6 mile round trip to re-set the gear sucks
This quote belongs to phil in the previous thread.
Mate, if you got any different model of nvidia card on that rig remove it and place all of them of the same. I bought a few weeks ago another TI which belongs to another company and my rig was crashing all time. It was due to this card which wasn't even able to handle half of the clock OC.