These are my specs. I need to upgrade my RAM because GTA V is using it all up. I'd like to buy 2 more 4GB RAM sticks but I was wondering, I have 4 RAM slots on my mobo but it's only dual channel. Would it it be better just to buy 2 8GB RAM sticks? If at all possible I'd like to still use the RAM I have now instead of having to buy all new. If not, could you recommend some good but cheap 2x8GB RAM.. Thanks guys.