My motherboard is a MSI KT4AV-L and uses 184pin RAM Modules. I was wondering if I ever plan to upgrade in the future, if I could upgrade it this way. The manual for the mobo says that it can only support 1 DDR400 Module, and theres three slots. I currently have 2 DDR333 512MB Modules in the pc, (1GB in other words) and I was wondering if I could have both DDR333 and then the one DDR400 in the remaining slot. Thank you.