To remedy this, I've tried resocketing my video card and unplugging and replugging in my monitor cable. When this didn't work, I tried resocketing it again, and it's working for now, but I wouldn't be too surprised if the screen gets messed up again.
I'm asking this question as more of a precaution, if my monitor does give this pixelation again. Is this one of the signs that I may need a new monitor. Is there an alternate explanation? Are there other signs I may need to look out for?
Thanks for reading.