Make sure you are installing the modules in the correct slots for dual channel. Check your motherboards manual to check which slots the ram should be installed for dual channel operation. Usually the ram should be installed ever other slot.
@tradesman1 im using i5-2500k i cant remember mobo name it is msi mobo.
sticks are Hyperx savage 1600MHz.
I tried both sticks, 1 keeps restaring my pc constantly, Other one is working normally