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#305523 - 28/12/2007 16:43 Power supplies - always draw that much power?
FireFox31 pooh-bah Registered: 19/09/2002 Posts: 2494 Loc: East Coast, USA	Hello, do computer power supplies always draw as much wattage as they are rated for? ie: does a 750 watt power supply draw 750 watt while sitting idle in Windows? I am building a new computer with a 750 watt power supply, but I don't want to waste a ton of electricity (and hurt my elect bills) over its life span. I'm oversizing the psu because my current machine suffered greatly from a weak 350 watt psu (hdd randomly powering off, random power cycling). Or does wattage even matter toward running up my elect bills? Should I be concerned with amperage and voltage? Oh wait, if amperage is "the size of the pipe" and voltage is constant, will I even be able to get enough wattage to power the machine? You may ask why I chose 750 watt. The machine has an SLI motherboard anticipating two gpus in the future. For now it has an nVidia 8800 GT 512, which is pretty power hungry. Also it has a 68 watt low power Athlon 5200+, two (IDE) to three hard drives, and a DVDR (SATA). I don't ever EVER want my hard drives to randomly spin down then back up while using the computer, which happened frighteningly often with my current crappy 350 watt psu. _________________________ - FireFox31 110gig MKIIa (30+80), Eutronix lights, 32 meg stacked RAM, Filener orange gel lens, Greenlights Lit Buttons green set
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Subject	Posted by	Posted
Power supplies - always draw that much power?	FireFox31	28/12/2007 16:43
Re: Power supplies - always draw that much power?	tman	28/12/2007 17:02
Re: Power supplies - always draw that much power?	mlord	28/12/2007 19:40
Re: Power supplies - always draw that much power?	FireFox31	29/12/2007 14:03
Re: Power supplies - always draw that much power?	mlord	29/12/2007 18:11
Re: Power supplies - always draw that much power?	mlord	29/12/2007 18:33
Re: Power supplies - always draw that much power?	Ross Wellington	29/12/2007 20:13
Re: Power supplies - always draw that much power?	FireFox31	30/12/2007 14:55
Re: Power supplies - always draw that much power?	mlord	30/12/2007 16:12
Re: Power supplies - always draw that much power?	peter	30/12/2007 16:15
Re: Power supplies - always draw that much power?	AndrewT	30/12/2007 16:23
Re: Power supplies - always draw that much power?	Neutrino	30/12/2007 20:32
Re: Power supplies - always draw that much power?	mlord	30/12/2007 21:10
Re: Power supplies - always draw that much power?	Ross Wellington	31/12/2007 06:40
Re: Power supplies - always draw that much power?	peter	31/12/2007 09:59
Re: Power supplies - always draw that much power?	AndrewT	30/12/2007 16:17
Re: Power supplies - always draw that much power?	mlord	30/12/2007 16:30
Re: Power supplies - always draw that much power?	mlord	30/12/2007 16:41
Re: Power supplies - always draw that much power?	jimhogan	30/12/2007 16:55
Re: Power supplies - always draw that much power?	Roger	30/12/2007 19:08
Re: Power supplies - always draw that much power?	mlord	30/12/2007 19:15
Re: Power supplies - always draw that much power?	tanstaafl.	31/12/2007 14:35
Re: Power supplies - always draw that much power?	tman	31/12/2007 14:44
Re: Power supplies - always draw that much power?	Ross Wellington	31/12/2007 17:34
Re: Power supplies - always draw that much power?	Robotic	31/12/2007 19:48
Re: Power supplies - always draw that much power?	mlord	31/12/2007 20:28
Re: Power supplies - always draw that much power?	Ross Wellington	31/12/2007 21:21