My family bought a dell dimension 4600 about a year ago. It has a P4 w/ HT clocked at 3.06...512 ddr dual channel RAM...80 gig hard drive and other things at this level. I have a few questions. Will a 250 W power supply be enough to run a new card i want to put in like a nvidia 6600 256mb and 512mb more of ram so there would be 1g total? Also, does any size lcd monitor display in the 4:3 ratio that is required for gaming? Thanks a lot!