• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

Silly power requirements, an over hyped myth?

fornowagain said:
That assumes the PSU has PFC, i.e. power factor = 1 (unity) otherwise the current is higher.
Click to expand...

True, true, but with Active PFC often being 0.98-0.99 (always 0.99 with high quality PSUs) its close enough.

Plus every time I try to wrap my head around power factors, I end up more confused than when I started :p
 
Boogle said:
True, true, but with Active PFC often being 0.98-0.99 (always 0.99 with high quality PSUs) its close enough.

Plus every time I try to wrap my head around power factors, I end up more confused than when I started :p
Click to expand...
I've put a working up there for you. But yeah, it makes no difference to the leccy bill as its only real power measured. But it does make a diffence to the fuses and wiring in the AC side of things. The reason I mention it is I think some of the US (Hiper) models don't have PFC, all EU ones should be ok.
 
Last edited:
fornowagain said:
I've put a working up there for you. But yeah, it makes no difference to the leccy bill as its only real power measured. But it does make a diffence to the fuses and wiring in the AC side of things. The reason I mention it is I think some of the US (Hiper) models don't have PFC, all EU ones should be ok.
Click to expand...

Ah nice, thanks :) PF is meant to 'contaminate' the power isn't it? Making it harder to convert (presumably) to DC.
 
Will have to get me one of those watt monitors :eek:

I'm running my system (see sig) through a extension that vaguely measures the load & a red light comes on when hitting 3000w. Well when in 3D the red light comes on, its obviously not using 3000w with my 580w PSU but maybe the amps use equal current? any electricians here?

I dont think lower watt PSU's give enough amps not watts thats why there are 700w PSU's ? anyone???
 
juno_first said:
Will have to get me one of those watt monitors :eek:

I'm running my system (see sig) through a extension that vaguely measures the load & a red light comes on when hitting 3000w. Well when in 3D the red light comes on, its obviously not using 3000w with my 580w PSU but maybe the amps use equal current? any electricians here?

I dont think lower watt PSU's give enough amps not watts thats why there are 700w PSU's ? anyone???
Click to expand...

What else do you have hooked up to the extension?

You've lost me on the amps & watts though. Amps is the number of electrons that flow through a specific point given a certain amount of time (in essence the actual current), volts is how forceful said electrons are. Think of volts as water pressure, and amps as water flow. Watts is just a single value that sums up both parts.
 
Boogle said:
What else do you have hooked up to the extension?

You've lost me on the amps & watts though. Amps is the number of electrons that flow through a specific point given a certain amount of time (in essence the actual current), volts is how forceful said electrons are. Think of volts as water pressure, and amps as water flow. Watts is just a single value that sums up both parts.
Click to expand...

ok, err 19" LCD, desktop speakers, only 1 extra fan in tower.
I noticed when I got another 2 80gb drives the power went up a lot, I'll have get a monitor & find out.

Noticed my old 2x 7800gtx used more power than 1x 8800gtx.
 
You must log in or register to reply here.
Back
Top Bottom