I am using a DH77EB desktop mobo with 2x2gb G.Skill DDR3 1600 RAM chips in slots 1&3 and wanted to add more RAM. While I realize it would be better to purchase 2 new RAM chips (2x4GB) it would be much cheaper to add two more identical chips to slots 2&4, giving me a total of 8GB RAM. Can anyone suggest why I definitely SHOULD NOT go this route? Seems 8GB in 4 slots would be better than 4GB in two. 64-bit Win7Ultimate.