Depends on Video card, and numbers of all types of drives. I have a system that runs an AMD 1700+ a 32meg cheap video card, two IDE HDs, a CD-Rom and DVD-burner, with "only" a 300W PS. Be carefull of the distribution of the 300W though to the various voltages. Mine is an Antec PS that came with a "non-performance" case. Rick Glazier From: "Uzi Paz" <[log in to unmask]> > I have to replace a power supply for a typical computer based on Pentium > 1000MHz (still coppermine), and I have decided not to buy one of those no- > name power supplies. > > Yet, I prefer if it is ok, not to invest too much in something very > expensive. > > Would a 300W power supply by a company like HEC, CoolerMaster, or > Thermaltake be enough, or should I spend more money on power supply which > provides higher power? The NOSPIN Group is now accepting donations to help defer the costs of providing PCBUILD and our website. Visit http://freepctech.com to donate using PAYPAL