Hello, I recently bought a Dell XPS 410 and I am a little worried about the power supply I got. Will the following specs keep my computer cool and not overheat? Pentium Core 2 Duo E6400 2.13 Ghz 1066 Mhz FBS 2GB Dual Channel DDR2 SDRAM at 667 Mhz 640 GB Performance RAID 0 Hard Drive 256 mb nvidia geforce 7900 gs Sound Blaster® X-Fi™ XtremeMusic (D) Sound Card 375w power supply Also, with the upgrades I'm getting, will the power supply increase its wattage? 512 mb nvidia geforce 7900 gtx 4gb Dual Channel DDR2 SDRAM at 667 Mhz Thanks!!