Dottsie

I would imagine it's not the mobo but rather either your PSU or GPU. When does the coil wine occur? Have you tried turning off the fan on psu and then the gpu one at a time and seeing if it persists. Then try turn both off and see if it persists. Do you have an AIO, could it be the pump?

As @deXxterlab97 stated it depends on what you play. Would you mostly play esport games or intensive games like GTAV?

I'm not 100% sure as I've not coded html/css in a while but is it to do with li { margin-top:160px; text-align:center; list-style-type: none; float:left; Try changing the margin as 160px seems a little too large.

Oh I follow now Have other programs been misbehaving? Always good to do a fresh install regardless. I like to do it twice a year(minimum). Keep things speedy Good luck with the reinstall!

^ grabbed the wrong comment to reply to haha. Anyway... Maybe try disable hardware acceleration from chrome and see if that helps. I've not had to reinstall Chrome ever but I may just be lucky in that regard. Worth a try though if all else fails.

Hopefully that works for you. Do you have any/many extensions installed? Just trying to narrow down potential cause. Also a malware/spyware/rootkit/virus scan is a good idea if you've not done one in a while, to be on the safe side. Also have you tried another browser? Just to make sure it's not network config related.

I think that's up to date, can't check right now as I'm in work. Have you tried disabling adblock and see if it persists? maybe try an incognito window.

What version of Chrome are you using?

Is that one of the cards aimed at e-sport players by chance?

I wonder, was it just the "L" key that wasn't functioning or did you notice anything else? If others were functioning weird it may be by chance you changed your system language? I remember changing mine from English to something else a while back and the ";" (key specifics escape me now) key was not functioning and another key was remapped to something else. Just an idea, glad you fixed it anyway.