What model # is the DRAM, can get the model # off the sticks themselves or look in CPU-Z in the SPD tab by Part Number, also do all 4 sticks show up in CPU-Z in the memory tab? We've had some buy a package of 4 sticks that shows 4GB on the package and think each stick is 4GB, when it's actually a 4x1GB set = 4 GB total