Since I am pretty much finished with my build, I am still needing to upgrade my RAM and my HDD storage. I currently have 3x2GB sticks in the computer (temporary) and I will be getting 2x8GB once I get my money next Friday. When I do get the 2x8s, would I be able to use the 2x8 GBs sticks with the 2x2 GB sticks to achieve 20 GBs of memory? Is there any compatibility issues as the new RAM will be clocked slightly higher (1600 Mhz) compared to the older RAM (1333Mhz) This will be helpful! Thanks!