i have the same problem with my dell XPS 15.
it stucks under 800 Mhz and i tried everything (battery, software installation...)
no one have a real solution for that problem?
I have the same issue. The PC worked perfectly for about a year and a half, and about 4 months ago suddenly started tremendously lagging. I've noticed that is simply stopped accelerating when i try to perform demanding acts.
Any chance this will be fixed soon ?
Tried all that. I cannot even use Photosop properly with a completely clean system .. performance keeps dropping constantly. I've had 2 XPS so far, this is definately my last one.