issue with 1660S

Recently I change my gpu from gtx 950 to gtx 1660 super and I encountered a weird problem. New card only works on "prefer maximum performance" in Nvidia control panel. I can run any game or benchmark without any problem, but when I'm trying to change it to "adaptive/optimal power" mode, then I try to run any game or 3d program, my screen goes for one random color and pc freezes after few seconds, only manual restart helps. I tried to uninstall drivers with DDU in safe mode, then install a few versions of new ones, but without any result. Even I plugged in my old PSU (corsair 450w, which should be minimum for 1660S) and same error appeared only in NV control panel optimal/adaptive mode. Idle temperature on "prefer maximum performance" are 50-52, and on adaptive/optimal 37-39, so I wish I could change it to lower ones. Does anyone have any suggestions?

CPU: i5-4460
GPU: Zotac 1660s
PSU: Cheftec 700w (changed from 450w few days ago)
Motherboard: Gigabyte h81m-s2h (latest BIOS, but still from 2015)

50-52 are not bad temps for a graphics card. Just saying.

I don't have a direct solution to your problem, but it looks to me like your Nvidia control panel is undervolting the card when selecting Adaptive power mode, and that shouldn't happen. Use something like GPU-Z to have a look at the voltages on the card when you use Adaptive Power mode and see if they are lower than spec.

You may find that for that particular card you may have to set it at max performance all the time to get it to run correctly. There's a malfunction somewhere there, but I'm afraid that I don't know what it is without more information.