This issue led me to change from Burning Crusade Classic Gold a 144hz main screen as well as a 60hz secondary display to one monitor at 144hz. I did this because I did not want to consider upgrading my system at this time and the old 60hz monitor was long due to be upgraded anyway.

In doing this, I made the switch to a bigger main monitor , which meant my GPU was now processing many more pixels, and both at that fast a refresh rate. Thus my GPU, which was fine in the past for something as easy as Classic WoW to run however, was in fact having to work. It wasn't up for the task.

I was able to see that, even with all addons off, regardless of matter what version of DX I chose, whether VSync was either off or on and no matter it was that my GPU was reaching its limits, the game would exhibit some flashing in the background at times. With all its lush foliage and zones like Nagrand my GPU could be stretched to its maximum and eventually lead to throttling.

And it appears that WoW's engine doesn't like it when the GPU controls my settings. My CPU was barely moving at all, but with my GPU running at its limits, I could see the flickering. Also, having addons enabled caused this flickering to get worse.

Therefore, I set my in-game FPS limit to 60 and things got much better. It kinda sucks because after playing at a higher refresh speed you'll be able to tell when you're going back to 60, but it's way better than the flickering that I had to deal with.

After changing my settings, however I still saw some flickering. While I initially thought it was my GPU however a portion of me believed it was the cause. My GPU isn't equipped to handle other games. I still do need an upgrade to my GPU at some point just since it's been time to make an upgrade. (I had planned to make my GPU upgrade this yet but , well ...) I am assuming that the GPU in itself is fine There are no hardware issues.

However, I believe that my problem lies in the fact that my version Windows 10 does not have the updated DWM, Desktop Window Manager, refresh rate code. And so when WoW on my primary display needed to bring its rate up to that of what my GPU could do, which was often not the 144 FPS it was, it would have buy WOW TBC Gold a problem. Since my second monitor was keeping 144hz as was the DWM would cause some flickering as it dropped the frames from my main monitor.