random restarts while playing

for the pass few days i was really confused about the issue with my pc as soon as i upgraded my gpu to gtx 1080ti and psu cx 750m the pc randomly restart by it self no error nor blue screen appears just restarts , especially when gaming or doing stress tests even those games which i was able to...

I recently used ryzen master to check voltage under load and cpu-z and it says that 3600 is boosting up to 3.7 - 4.2 volts. its this normal as it seems quite high. I checked the cpu in bios and its set to auto. And ram is at 1.35 volts with xmp enabled. I have had some system reboots under load...

my video card is not appearing in device manager and nvidia driver not detecting it. but its displaying as standard graphics. it has 6 pin and 8 pin but its connected in psu. what seems to be the problem? my psu? or vcard problem? CPU SPECS: i7 3770 8gb ram psu 800w with 12v 24amps and 12v 21...