AntonioNguyen :
So should I change to higher power psu or change to some other better brand with the same power. Because my budget is limitted now
I'll just quote myself:
If your budget is far too limited, at least try for Corsair VS500, Antec VP500 if not Seasonic S12II, Antec High Current Gamer, XFX TS, Corsair CXM.
For the budget limited, the Corsair VS, Antec VP you want >50% max capacity than what your system would draw. And for the VS, avoid the old 450/550W and go for the newer 400/500W instead...
For the later group, Seasonic S12II, Antec HCG (mod of SS M12II line), XFX TS (mod of SS S12II line as I recall), Corsair CXM they are well designed enough to take 100% load if needed (so the minimal capacity available for each model: S12II 430W, HCG520W, TS550W, CXM450W would still be fine for your build).