You said it's a 400MHz AGP Graphics, right? These two sites say it's got a 200W power supply: http://www.apple-history.com/body.php?page=gallery&model=g4agp&performa=off&sort=date&order=ASC&range= http://support.apple.com/kb/SP123 -- Rich On Sat, Jan 31, 2009 at 3:11 PM, c m <dachamp_11226 at yahoo.com> wrote: > > So I have decided to upgrade both the processor AND the video card. anyone know the power supply in my G4? There is a sweet deal on a Radeon 9600 Pro but it requires a minimum of 250W power supply