My old setup was laptop MSI GT70 0NE (CPU Intel i7 3630QM, GPU 680M, Windows 7 Pro X64)
My new setup is laptop LENOVO LEGION Y740 (CPU Intel i7 8750H, GPU 2070 MaxQ, Windows 10 Enterprise X64)
Blender 2.81a (same Blender version with both laptops, I just configured my new one a few days ago).
In short the new setup smokes the old, rendering under Cycles is about 14 times faster, with the Optix option. And it’s much faster all around for all apps.
Yet… sometimes when I load a rather heavy file in Blender (when I say “heavy” I mean a file that was still manageable with my old laptop) the mouse has some stutter.
The stutter persists even when I leave Blender in the background and work on another open app. Blender is doing nothing at the time, no rendering no calculations.
(Now that I think about it, I have not increased the TDRDELAY value in the registry, which is the only setting I can think of that I have not copied over. I don not think this could be relevant? )