[gentoo-amd64] Re: Re: Re: mce log errors

[Duncan]

Deedra Waters posted <Pine.LNX.4.64.0512070835120.6330@monster>, excerpted
below,  on Wed, 07 Dec 2005 08:35:30 -0600:

> I don't know what brand, i'm totally blind, so couldn't read anything on
> it to tell you.

Wow!  I didn't know that!  I had seen a picture of you from one of the GWN
articles (the one covering the live bug day gathering up there in
Portland, last winter, IIRC), but didn't know /that/.  Cool!

That means you probably have a very good appreciation for the
Massachusetts OASIS standards debate, which MS turned to a question of
disability coverage.  I'd love to read it, but of course it's off topic
for here, unfortunately.  Still, if you have a blog or the like with your
thoughts on FLOSS accessibility both there and in general, feel free to
post a link!

They say the internet is a great equalizer, as it really doesn't matter
who you are, what you do, or what personal challenges you may have, only
what you know and are willing to share.  I have certainly found that to be
the case, here.

> I do know that this board did require the 8 pin thing for the board as
> yours does, and we did have to get a specific power supply for that.

It may be, then, that your supply is just a bad one, or that it's the CPU
itself that's bad.  I don't believe products with that 8-pin thing are
common enough to reach the low end in quality, so it's probably a one-off
deal, or as Nuitari suggests, simply a capacity issue on one of the
outputs while the others are fine.

FWIW, the ratings on my Vantec, from the manual, in the same order as
Nuitari's, for comparison, are:

+3.3V * 26A = 85.8W
+5V   * 52A = 260W
+12V  * 28A = 336W
(Only a single +12V rail)

The documentation limits the total of the +3.3 and +5V wattages also to
260W, the same as the +5V alone.  There's a total limit on all three, the
+3.3, +5, and +12 volt wattages, of 500 watt.

So... my overall rating is higher, as is my +5V rating.  +3.3V is a bit
lower, and I have only the single +12V rail, rated a bit lower than the
combined wattage of his two +12V rails.

As with him, there's also lower wattages available for +5VSB (stand-by),
-5V, and -12V.

If you can find the brand and model number of your supply, the numbers for
it will hopefully be available on the manufacturer's site, in a usable
format.

For point of power reference in relation to drive usage, my Seagate SATAs
say maximum spin-up draw is 2.8 amp @ 12 volt, so roughly 11 amp if all
four are spun up at once, 14 if the fifth drive is assumed to have
similar power requirements. Operational draw is of course much lower, .85
amp on the 5 volt, .79 amp on the 12 volt, according to specs, so 4.3 amp
5 volt, 4 amp 12 volt draw, five disk operational.  Say 5 amp total
for each voltage, 5 and 12.

Of course, to that you must add memory/CPU/mobo/fan/expansion use. 
However, 25 amps on the 12 volt should be plenty, unless you have
unusually high draw expansion needs.  It /may/ be your 5 volt giving out,
given the disks use that as well in operational mode, and 5 volt use is
more common operational use on bus/mobo powered peripherals and expansion
cards, as well.  Note how high the 5 volt amp rating on mine is, and I'm
not having issues, with a setup fairly similar to yours.

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman in
http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html


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