thermal throttling bumblebee but not with prime

Ubuntu 14.04.3 i5-3210M GT 650M Samsung NP550P5C kernel 3.19 xorg 1.17 nvidia-352

ALL games start limiting their framerates from ~50 to ~15-20 after a few minutes using bumblebee
then go up again, elements of thermal throttling…

That doesn’t happen using nvidia-prime!

Cleaning my laptop/swapping thermal paste helped a lot but the problem is still noticeable…

Games start lagging when GPU reaches 83C…
with prime i could reach 90C+ with no problems whatsoever

Any solutions, except using nvidia prime, which is awkward (serious screen tearing)?

EDIT:

Sorry everyone for wasting your time… it was intel_powerclamp which caused the issue, now i just have to find a way to even out the drastic measures it takes…