Hey I have a motherboard that says it will support "unregistered non-ECC DDR 400/333/266 DRAM up to 4GB". I am wondering can I use sdram memory for this board? And what if it IS registered? I think they are simply toting some pluses here, but I don't want to take the chance of buying something and it not working. The manufactor is in Japan (hint: when buying a product like this make sure they have toll free number), so I can't call them, and the store from which I purchased the item is withholding any techincal type comments (jerks). Thanks ahead of time for your help!