Always try to keep the number of memory sticks low, since more components means more heat. You also need to constantly check for stabililty after every OC process, especially when you're OCing memory.
You should also look for your motherboard's Qualified Vendor List (QVL). Or is that what you meant by "ram backup list"? In any case, try to also stick with what Gigabyte recommends withe the mobo QVL.