Hello, I'm in the process of what started out as a component upgrade that has escalated into a full-scale rebuild. I went out first to upgrade the RAM, then the video card, etc. I need a new a motherboard. I have an existed slot-378 P4 processor that I would like to be able to use, but I am not "married" to it. I recently bought two 256mb 184-pin cards (existing motherboard was from a DELL. Originall configuration for it was 184-pin RIMM w/ECC PC800). The new motherboard *must* have with a PCI-express 16 slot. I just got an ATX case with 500-Watt power supply. I would like to use my existing RAM cards, but they are for a machine that used RDRAM. Is any 184 pin card swappable to any 184 pin motherboard? Finally, I would love to be able to reuse my existing RAM or CPU, but do not have to (would prefer to reuse the RAM). The intent is to build a computer capable of playing games such as Oblivion. Does *not* have to be hardcore or top-of-the-line, but a decent machine for home entertainment. Thanks!