I am building a computer for the first time and I thank anyone who can offer suggestions to my question. I will be building the system from the MSI 790 FX-GD 70 motherboard and AMD Phenom II X4 965 Black Edition processor. My question is what RAM would be compatible with this system and the most beneficial for gaming? I would like to buy at least 4 GB for around $150 or less. Thanks to anyone offering advice.