So i DDUd the drivers and also reseated everything. Sadly the lag still didnt get fixed. I realized it wasnt my gpu but my cpu that was the problem. it seemed that the cpu clock dropped from 4.4 ghz to merely 10 Mhz or something at times. I tested cpu stability using Intel Extreme Tuning Utility and found that memory test made the huge lags happen. Then i realized i had swapped the 2 ram sticks i have around in the ram slots. I use one of those sodimm to dimm converter to use a 8 gb laptop ram on my desktop. I swapped them back to how they originally were and the lag is gone! So i guess that was the cause. Thank you guys for ur input!