I am building a PC for the first time. I'm not very familiar with the electrical aspects of it. I have an old 300W PSU. I just got a brand new Intel DG965WH motherboard with integrated Graphics Media Accelerator X3000, 6 USBs, 1 Firewire, 1 PCI-e x16 slot, etc. etc. and i'm puttin in an Intel Core 2 Duo E6300 1.83GHz with 1066FSB and 2MB cache. I was just wondering if the PSU would be sufficient because I have no idea what would or could go wrong if it is insufficient. Note also that I will be using a DVD-ROM drive on this machine as well as a Western Digital Caviar 120GB Ultra ATA drive, so they will also require power as well as a case fan. I can't seem to find the proper documentation regarding these electrical specifics. I'm probably going about this all wrong but any help is appreciated.