No, it is not graphic card or driver issue.
If you see glitches only when using specific version of a some software then the problem is that software.
It could easily be problem with video driver - just very rare or undocumented case, which reveals itself only with some specific Opera version.
Be it only Opera (or rather Chromium) bug, it would be reported by many more Opera users.
Most likely it is combination of some minor bugs from both sides.
No it's not driver. It's Opera 74.
5 different NVIDIA driver versions in combination with Opera 74 gave the very same glitch. And Opera 73 and Opera Developer 76 gave ZERO glitches with the same drivers. I've spent about 2 weeks testing Opera 73, 74, Opera Developer 76 (when it was released) with different drivers. Glitches appeared only on Opera 74.
At least on Windows 7 it's definitely Opera 74's fault.
Probably works fine on Windows 10 - did not bother to check.
And yes, if you update software and get a reproducible glitch its about 99% chance problem is in a new version of software. It comes from about 25 years of experience. But since i have a lot of time (working from home is more productive in my case) i did check other options just out of curiosity.
What i really want to know will Opera 76 be free of this glitch like Opera Developer 76 is.
It's useless to report such glitches with Opera because all you'll get is lots of BS about everything else's fault except for Opera.
It's better to just use version of Opera/Opera Developer w/o glitches or different browser. All you get trying to report glitches with Opera is a lot of frustration.