I might have screwed up my 980M, can someone verify?

Jan 13, 2019
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Hello everyone, newbie to the forums here. I need a bit of help with my 980M

Specs are the following:
System is a Clevo P750DM

CPU: Intel Core i7 6700K (4.5 GHz OC w/ -0.060v undervolt)
Memory: Micron 2x8 GB 2133mhz SDRAM
Storage: Samsung NVME 960 EVO 1TB
GPU: Schenker GeForce GTX 980M 8GB MXM (Driver is 417.35 with vBIOS 84.04.88.00.1C)
Display: CMN15B9 with a 89.998hz OC / Dell U2717D

Yesterday I was trying to overclock my GPU (Stock 980M 8GB Vbios) with nvidia inspector, without overvolting I could get a +135mhz core clock and a +750 memory clock which was very stable using furmark. Out of curiosity and wanting to overclock it more (I wanted to get the custom vBIOS from techinferno but my account was too new to download it) I bumped up the voltage to this: https://prnt.sc/m6nxl2 (sorry for terrible screenshot).

After applying, artifacts showed up on both my 2 montiors and I panicked. a lot. After putting the system into sleep/standby mode, it stopped and right after and I reset the default settings. Since then, strange things have happened. Trying out Portal 2, I got this weirdish artifact on one of the surfaces which I don't think I've ever seen before. Take a look (It looked worse than the screenshot taken): https://prnt.sc/m6o0qm

This is what nvidia inspector says after the incident when running Furmark.
nvidia-20190113-120658.png

These are my Furmark settings
bxQLo9A.png


On my two monitors, I seem to get this strange artifact once in a while when the voltage needs to raise above 0.850mv. I wasn't able to get a screenshot of it but I can try to describe it the best I can.
It's usually a sort of white squiggly-like line with some black in there too. It appears for not even a split-second and then disappears.

I've probably haven't provided enough info or have been clear enough, but if I did please tell me so I can make another post in this thread with some clearer or more info.