PC Power Draw?

[Topcat]

Re: PC Power Draw?

Been "reading the mail" sporadically, but finally dropped in to post.

With any luck, more to come...

Always nice to see you.... Very informative thread as well.

[kaboom]

Re: PC Power Draw?

Always nice to see you.... Very informative thread as well.

TU...

OT, but I shouldn't shorten your handle to "TC" too much, otherwise you could be mistaken for a helicopter tour guide who gives "free rides," LOL.

"Magnum, not again, dammit! Phooey!"

[Topcat]

Re: PC Power Draw?

TU...

OT, but I shouldn't shorten your handle to "TC" too much, otherwise you could be mistaken for a helicopter tour guide who gives "free rides," LOL.

"Magnum, not again, dammit! Phooey!"

Hey, I love that show. Always nice looking women on it, and a ferrari model that I've actually driven (308GTB)!!

[kaboom]

Re: PC Power Draw?

Hey, I love that show. Always nice looking women on it, and a ferrari model that I've actually driven (308GTB)!!

And they got over on poor Magnum every time!

Mix n match:

“Remember I told you I didn't like getting egg on my face? Well, right now, I'm wearing a whole omelet.”

Have you seen:
http://magnum-mania.com/Lists/Classic_Scenes.html
https://quotecatalog.com/communicator/thomas-magnum/

Work the lock, don't look at the dogs.
And you owe me $50!
"Recycled how?" "Through a cow."

[Topcat]

Re: PC Power Draw?

^
That brought back some great memories!

[Per Hansson]

Re: PC Power Draw?

FWIW, this PSU is a Supermicro PWS-865-PQ 865w unit. I should have put that in my original post; it seems pertinent information.

That is an APFC power supply according to Supermicro with a power factor of 0.99
So it should measure the same on the old and new meter.
But a good way to make sure the new (and old) meter works as intended is described in this old post:
https://www.badcaps.net/forum/showpo...postcount=2444

Here is the test report and specs of that PSU from what Google provided:
https://cdn.badcaps-static.com/pdfs/...7185a619d9.pdf
https://cdn.badcaps-static.com/pdfs/...87410c7421.pdf

[eccerr0r]

Re: PC Power Draw?

Ugh. I can understand running that 24/7 when it's cold in the winter and you need heating. But in the summer when it's hot, I keep nothing turned On when I'm not using it.

That's sort of the problem with PVRs and webservers, can't exactly tell when it needs to be on when it's getting "requests" off the air or online... so they need to be up waiting for them (And even if it's not actively recording, it still needs to pick up EPG data.)

The other thing that pisses me off is that one of the DVBs I have, it goes bonkers when suspended. Driver problem probably, else suspend/resume would have been a good solution, alas foiled...

[Topcat]

Re: PC Power Draw?

That is an APFC power supply according to Supermicro with a power factor of 0.99
So it should measure the same on the old and new meter.
But a good way to make sure the new (and old) meter works as intended is described in this old post:
https://www.badcaps.net/forum/showpo...postcount=2444

Here is the test report and specs of that PSU from what Google provided:
https://cdn.badcaps-static.com/pdfs/...7185a619d9.pdf
https://cdn.badcaps-static.com/pdfs/...87410c7421.pdf

Thanks, good info. Just for grins, I did order a P3 "Kill-A-Watt" model 4400, which I'll test against the old PM57 power monitor....which should read about the same....back when the PM57 was made, SMPS's weren't the standard; not sure if they had even been invented yet. I'm guessing that meter is circa ~1960's, maybe 1970's. I've had it since the early 90's, came from a defunct shop I bought out.

To everyone participating in this thread, good refresher!! I vaguely remember this from my first year in electronics....

[eccerr0r]

Re: PC Power Draw?

Nonlinear loads predate SMPSs, so there have always been loads that tricked the PM157.
It's a diagnostic equipment, not a way to compute how much you have to pay for electricity...

[Topcat]

Re: PC Power Draw?

It's a diagnostic equipment, not a way to compute how much you have to pay for electricity...

That;s not really what I was curious about.... Just curious as to what kinds of loads were being pulled from line under different kinds of tasks.

[eccerr0r]

Re: PC Power Draw?

You were lucky to have an APFC PSU and you can compare results. Once you throw in a non PFC PSU you can't. Can't even compare with itself really, you can get a number but it's not meaningful, like if you got 3 when banging on the GPU and 1.5 when you're not, you can't necessarily say that it's double power in the first situation (it could be be more like 2.5x depending on the PF).

Of course this will be moot once you get the Kill-A-Watt which you can do the same as your PM157 and more, including comparing non PFC PSUs.