Hi, Is there a specific way to determine when a 250 watt power supply is not enough? All the ide/scsi products inside the computer, plus cpu, fans, floppy drive, motherboard, need to be powered. But how can a power supply be monitored to verify it can supply the right quantity of power? Any rules of thumb or scientific procedures? Thank you for you help! Andre Chiasson Quebec City _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. PCBUILD's List Owners: Bob Wright<[log in to unmask]> Drew Dunn<[log in to unmask]>