Short story, it has been a while since Windows allowed multiple monitors’ refresh rates to WOW TBC Gold function: After nearly 13 years, Microsoft seems to have solved a long-forgotten issue in how Windows deals with multi-monitor refresh rates. In the past, Windows 10’s Desktop Window Manager (DWM) caused frame-skips and stutters while having multiple monitors running with different refresh rates. The issue appears to be corrected by Windows 10’s DWM 20H1, which has the ability to support hardware-accelerated GPU scheduling (WDDM 2.7). A Reddit user has demonstrated this effect.

This issue caused me to change from a 144hz main screen as well as a 60hz secondary display to one screen with 144hz. This was due to the fact that I didn’t intend to upgrade my system, and my 60hz monitor was due to upgrade.

However, I did it by upgrading to a bigger main screen. This meant that my GPU was now driving larger pixels at a faster speed. My GPU was forced to work, even though it was being adequate for the classic WoW. And it was not adequate for the task.

Even with all addons turned off I was able to see that the game might flicker even if VSync was turned off or switched on. This occurred regardless of whether my GPU was reaching its limit. Zones such as Nagrand, with all of its lush vegetation, would push and keep my GPU running at 100% which eventually lead to cheap WOW TBC Classic Gold it throttling.