shapphire hd 7770 1gb power supply ?

Intex PSUs are crap.
are you from India ?
you should change your PSU for better GPU.
Those PSUs are not good for PC's health 😛 .
You'll lose your GPU within 1 year.
you should better upgrade to Corsair CX 430 or VS 450,
just make sure that these PSUs will fit in your case.