Day before Yesterday I upgraded my computer to dual core. It is a ddr2 ram process I bought a ram of 512 MB with it. Previously I also had a ddr2 ram of 512 MB. It was written on the manual that ddr2 ram is compatible with it. But it is not working Please tell me what may be the reason. I am very upset. I can’t do it on my own. Please tell me as soon as possible what to do about this problem.
