In our case there are two speeds: slow and glacial. It doesn’t bear thinking about, else I’d cry into my beer!
There is method in The Poison Elf’s madness, when you think it thru. He’s a lazy bugger at the best of times, and he’s starting with the easiest component to swap (the screen), then moving to the video card — that isolates-or-otherwise the hardware, which is the Easy Answer. Then moving to the drivers (first screen, then video card) as they are the next easiest to isolate.
Failing that, it’s a bug-hunt for some obscure setting or another...
I only have on monitor here (LCD flat screen) so thats not the problem.
I have never used the screen drivers on either machine. I might as well load them up on this machine.