Thanks Greg. I have no stature, but I accept this suggestion.
A reasonable LOAD test.
Duncan
On 08/01/2011 19:00, Greg Sevart wrote:
If you're trying to find max load, I would encourage discharging the battery
to 60% or so and re-installing it, and then stress the internal components
to 100%. Keep in mind that your power adapter needs to not only power the
system itself, but also the battery charging circuit. Your worst case load
will be doing 100% utilization while charging a depleted battery.
-----Original Message-----
From: [email protected] [mailto:hardware-
[email protected]] On Behalf Of Anthony Q. Martin
Sent: Monday, August 01, 2011 5:09 PM
To: [email protected]
Subject: Re: [H] PFC (power factor corrected) PS for PCs?
The input is the (rms) voltage (fixed, depending on where on the planet
you are) and max current expected to be drawn from the wall socket.
Those are AC.
The output is DC that comes out of the converter to supply your laptop.
It would be wise to meet these specs if you replace it, though you could
probably make it work if you got close (exact on voltage and close on
current), but you'd better not force the laptop to 100% load. Looks
like your laptop can draw 120W max. The input (wall) can easily simply
that @ 2A.
The pf of 0.5 isn't bad according to your power company since you draw
comparatively tiny current and power and your leads are short, so
you're not losing huge amounts of power to heating wires and stuff. From
a purely 'green' POV, it could be considered bad...but you also have to
consider the cost of PFC on a unit like your laptop. Probably not much
to gain by it.
Draining the battery won't cause your laptop to draw max power. For
that you need to load it up with some benchmark that drives the HDs,
CPU, and GPU as hard as possible. You could even remove the battery and
draw power straight from the wall socket. No good reason to stress the
battery.
Yes, if you expect to run your machines at max load then you need to
budget accordingly. I don't run my machines at max load, though, so I
can get lots more time from a UPS than would be indicated by using max
load conditions.
