I've just purchased the GTN 750 so that I can use it while flying the Flysimware's Learjet 35A in VR using Oculus Rift. However; since adding it to the panel my frame rates drop to a point where I continually get an hourglass popping up and the screen stutters to a point where it is unflyable.
I'm running Intel Core i7-8700K Liquid Cooled CPU, 11GB GDDR5X NVIDIA GTX 1080Ti GPU, Windows 10 Professional, 1TB PCIe SSD + 2TB 7200RPM HDD, 64GB DDR4 RAM