I am holding out for the Asus A7M266-D (anyone know when it is coming out). At any rate, I will be buying a gig of PC2100 (4x256Mb) soon before prices inevitably go up. At any rate, I am pretty sure that I have heard that with DDR mobos if you use more than two DIMMs you have to use registered DIMMs. Is this because of signal noise? Can anyone confirm this? I just want to know before I go out and buy a gig of RAM. Thanks in advance.