After looking around I found something useful that I had to tweak for my system to get it work, so simply taking their solution 2 and tweaking it to look like :
sudo rmmod -f iwlwifi sudo modprobe iwlwifi 11n_disable=1If you notice that the wifi speed improved, then make the change permanent :
gksudo gedit /etc/modprobe.d/iwlwifi-disable11n.confand add this line to the file:
options iwlwifi 11n_disable=1save and quit.
If you're on battery, turning off power management could help as well
sudo iwconfig wlan0 power off