[rescue] x86 power question

Nick B. nick at pelagiris.org
Mon Nov 13 11:51:45 CST 2006

I have seen low voltage, or even worse flakey voltage fry just about every
component inside a PC, mem, disk, CPU, everything.  It's my personal bogeyman.

On the note about 1kw power supplies, if you want a real serious power supply,
PC Power and Cooling is one of the top vendors.  They decided to be silly. 
They came out with a 1KW power supply, rated to deliver 1KW at 50C.

On Mon, Nov 13, 2006 at 10:52:43AM -0500, velociraptor wrote:
> I'm still wrestling my x86 box...and have another question.
> I actually got out the DMM and measured my +12V and +5V rails under
> load.  I discovered the +5V was low enough to be out of spec.  (+12V
> is rock solid.)  I'm pretty surprised, as the PSU is a higher end
> Antec True Power 550W, so I have a query in about a warranty repair.
> Anywa, my question...could sagging power damage the motherboard and/or disks?
> I ripped the power hog ATI 9800 video card out and put in the older
> one I had, and the +5V stabilized and came into spec, but I am still
> seeing boot disk issues.  Oddly, the disks connected to the RAID card
> (both powered by the same PSU) are showing zero problems, so I am
> wondering if the low voltage damaged the on-board IDE chip set rather
> than the disks.
> CPU seems ok, machine posts even in the low voltage condition.
> I don't have another x86 box I can use to run the bootable Seagate
> tools to test the disk directly connected to an IDE chain, and I don't
> think the Windows based Seagate tools will work on drives connected
> via a USB or FW bridge.  I should probably just bite the bullet and
> buy a new mobo, given the age of the system but my SA gene wants to
> know the root cause.
> Thanks--
> =Nadine=
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