Ubuntu 14.04.3 Intel HD 4000 stuck at 1050-1100Mhz => Heat

Samsung NP550P5C S02 i5-3210M, Intel HD 4000, Nvidia GT 650M Ubuntu 14.04.3, kernel 3.19, xorg 1.17 nvidia-352 Ubuntu 14.04.3 Mesa 10.5.9

dmesg

gives me some

[ 4565.419502] intel_powerclamp: Start idle injection to reduce power
[ 4592.479139] intel_powerclamp: Stop forced idle injection

while gaming with primusrun after a few minutes, so the games lag A LOT!

So I realised it is my intel card on high frequency all the time (1100Mhz)

Any suggestions how to reduce its clock??!! Should i post any more logs?!!

What i've already tried and didnt help:

1.TLP 

2.laptop-mode-tools

3.disabling turbo boost
(echo "1" | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo)


4.updating intel_microcode (update successful, but no change)

5.putting i915.enable_rc6=1 on GRUB boot parameters (no change whatsoever,
  maybe it is enabled by default for my card)

Is it possible to underclock or set a frequency to Intel HD 4000 (IGP)

The above question is similar, but i would like a cleaner and less risky solution to make my card manage itself properly.