Hi, this is my first post so bare with me. I own an HP Pavilion XT978 (2.0 GHZ Pentium 4, 512 MB SDRAM, 100 GB Hard Drive, CD-RW, DVD reader drive). I want to install a DVD-RW in place of my CD-RW, which will give me two dvd drives. The computer came with a 200 watt power supply, and both drives were in the pc from the factory. I was wondering what the differences were in power consumption levels between cd-rw's and dvd-rw's. Can my 200 Watt power supply handle the replacement? Thanks. P.S. The DVD-RW is about a year old, and is a TDK 440N (4X DVD-R, 2.4X DVD-RW).