I'm trying to build my first computer. I've got the case, powersupply, fans, P4 800 fsb Gigabyte mobo, P4 2.8 mhz/800 fsb, a maxtor 40 gig 7200 rmp hard drive, 512 Kingston Ram, CD rom, and ATI 9700 All in One Wonder. My question deals with powers supply. As I've read on this post the newer faster componets require more power. I've trying to get the newest fastest componenets withing reasonable prices. I thought I was doing the right thing my ordering my Case with a Antec 380 True Power Supply. I have a promblem with my computer restarting itself for no reason, especially during gameplay. I can usually get a game running for about 1 minute and my computer either freezes or re-boots itself. From what I've read on these boards regarding ATI 9700 cards and power supplys I'm wonding if I'm not getting enought power? So I tryed installing an older GEFORCE II card to see if the ATI card was the problem. I was able to play Day of Defeat for about 3 minutes this time before my system reboots itself. I've looked on the power supply I have and even though its called Antec 380 True power a sticker on the PS says 360w Max output. So if what I'm reading on these boards it true that a PS only buts out maybe 60-70% of its max that would put me at about 216-252 average wattage. Based on what I've read that doen't seem to be enought even for my system not having any additional DVD drives or additionl cards. Anybody have any suggestions. Should I go with a bigger power supply or keep searching for another problem. My computer runs great except when it reboots itself. I'm thinking if I get a new PS to get the biggest and best I can get. Any suggestions on that. Any help would be appreciated. I'm dying to get this baby running smooth.