My pc freezes everytime after about 5 minutes after startup with my new ram. What to do to fix it?

[rishiraj5565]

Why is my pc freezing everytime after about 5 minutes after startup with my new 4gb ddr3 single ram?
But whenever i insert my earlier 2gb ddr2 ram, it works fine.

 

[Tradesman1]

What mobo/CPU, must be a hybrid if it can run either DDR2 or DDR3