Matt said:Hi all,
I'm just wondering if there's a way to work out a suitable power supply
wattage for a system. My 400w supply blew up over the weekend so I'm up
for a new one but wondering if I should get something bigger.
I'm running a Gigabyte GA-7VA mobo with an AMD Athlon XP 2000+ at the
moment although I'll probably upgrade the chip to a 3000+ towards the end
of the year. I've got a 52x24x52 CD-R/W drive, a 52x CD-ROM, floppy, a
20gig HDD (will be upgrading to around the 120gig mark soon). What else
uses power? I've got 6 powered USB ports, 3 of which have permanant
peripherals in them (printer/scanner with it's own power, modem & mouse),
but I often use up to 5 at once (with the camera and flash drive). The
only cards I've got at the moment are a 4x AGP card (64meg GeForce2) and a
LAN card. Oh and one 8cm case fan. I don't run the monitor through the
power supply, it get's it's own socket.
I've got an old 250w supply in there (with the 2 CD drives disconnected)
until I get the new one. So will 400w be enough to fulfill my upgrades (XP
3000+ cpu and 120gig HDD) or should I go 450 or 500?
Wattage is misleading. The important thing to look for is the amps put out
on the +12V line. Since most of the components you have that need power get
it from the +12V line that feeds the motherboard, that's where you need it
most. Many PSU's have high power ratings but don't supply as much juice on
the +12V line as a lower rated PSU.