I'm buying memory for a new computer. The motherboard supports ECC memory and I'd like to get ECC memory but I only have the money for 1 64 meg DIMM now. I read a thing that said "you need two ECC modules used together to perform the ECC function." Can I use 1 ECC Dimm by itself for now and still have it work without the ECC functions till I get another 64 Meg DIMM? Or will the system not function till I get 2?