Stutter test : HT ON and reset OC in Microsoft Flight Simulator (2020) Posted August 21 Yep P3D runs better with HT off MSFS better with HT on. Although in saying that I definitely think the game is poorly optimized for some people. GPU looks to be getting a max utilization of 60% for me. Plenty of complaints on the official MSFS forum about it too. Testers saying that they were getting fantastic performance during alpha/beta but release version as been abysmal. So it will just be a matter of waiting until on a fix for this. It's still playable in the meantime I found that flying at low altitudes and being on the ground really tanks performance. Once you're at 1000 ft it's fairly smooth.