@Dom Guess what's back? The Flicker! I don't know wtf happens when I'm gone all week, because the last time I noticed the flicker was when I had come home from traveling all week.
Just like before, there is a new nVidia driver I could download. I Googled it a bit more and some people fixed the issue with a new cable, but those were all people that used the stock DP cable, and I didn't do that. I had gotten an Amazon Basics DP cable right from the start. Others updated the firmware/drivers of the monitor itself, but the highest Acer goes is Windows 8 64 bit, but I'm on Windows 10.
Maybe I'll flip the cable around, or even try out the stock cable and see if it's the same problem?