The 110 VAC line varies by quite alot all day long, the UPS switchover
should not be seen as anything different.
The PC switcher powersupply has enough capacitence to keep running for
more than long enough to prevent any VDC dips.
I know of no UPS that opperates poorly enough to even be noticed.
Of course, dont forget the reason the UPS is there, the VAC line is
going down and VDC supplies are going to fail. This will cause drops
that can damage the HD and other parts. So even if it has a slight
chance of a problem isnt that better than a guareneteed one?
If you have some examples of combinations you know fail I would like to
know of them. A poor UPS and a underrated powersupply could fail.
I have never had a single computer damaged by storms, I never shut down
in them even when on modems.
I use UPS with phone and LAN protection built in.
I use a Belkin 650 gold with conection to my computer to handle
automatic shutdowns in case the power is gone to long.
It logs to file info about line quality and will graph it etc. Thats
useful if the power company feeds you junk power.
The software talks and will tell you if power is lost, if load limits
are approached etc.
The UPS powers my 21" monitor, P4 3.2Ghz computer, Cablemodem, Network
router and printer.
I think it cost me $150 or less and should be cheaper now.
On a side note, you are suppost to replace the batteries every 3 years
but I never have. Their capacity drops over time, but the Belkin
autoshutdown calculates based on capacity remaining so will work fine in
general. Of course a battery failure will need a replacement.
I hope this helps.
Axle Gear wrote:
> Be warned, however, that if your PC is sensative to voltage dips, a
> UPS can cause PERMANENT PHYSICAL DAMAGE. Check the speed of
> switch-over on the UPS!
> Not all UPSs are made equal!
> Whenever the power goes out, the UPS 'switches' from wall power to
> battery backup. This takes a few nanoseconds. If your system devices
> cannot function during a drop or outage that long, they can be
> damaged. Namely harddrives can get stuck parked, and require a
> hard-reset or, in the case of some older drives, manual physical reset
> of the read/write head. Either case can cause data corruption.
> As well, check the min/max voltage peaks on the UPS. If the switch
> causes a surge too high, it can fry sensative parts, especially the
> CPU (which can fail from just a 0.05v overvolt!)
>
> Athlon64's are especially picky, as are P4ee systems. Some
> motherboards also hate it, such as the A7N8X line (and most nForce
> chipsets, for that matter), and some Intel chipsets.
> Most durable are Via and SiS chipsets. For as moderately as they
> perform, they take incredible abuse.
>
>
>
> ----- Original Message -----
> *From:* noneyet10 <mailto:noneyet10_at_cox.net>
> *To:* SkunkworksAMA_at_yahoogroups.com
> <mailto:SkunkworksAMA_at_yahoogroups.com>
> *Sent:* Saturday, June 04, 2005 4:07 PM
> *Subject:* Re: [SkunkworksAMA] Re: Digest Number 1444
>
> I'll toss in my two cents worth of advice too. G. Buy a battery
> back-up for
> your computer. When the lights go out, your computer and monitor
> will still
> be running long enough for you to save your work and shut
> everything down
> safely. Trust me. The very first time that the lights go out while
> you have
> three hours worth of unsaved art on your screen, you will feel a
> thrill of
> elation and you will cheerfully say to yourself, "Hey! I still
> have 15 to
> 20 minutes to save my work and turn off my computer." G. That's
> such a good
> feeling to have that it's worth the price of a battery back-up. Most
> computer stores carry them too.
> http://www.apc.com/products/category.cfm?id=13&subid=5
> <http://www.apc.com/products/category.cfm?id=13&subid=5>
>
> Edward Fox
>
> At 04:00 PM 6/4/2005 , you wrote:
> >*shudders at the thoughts of reinstalling everything*
> >i hate it when that happens. but you seem pretty
> >confident :) hope it all goes smoothly.
> >
> >--- "Take a wild, friggin guess"
> ><a_change_of_plans_at_yahoo.com> wrote:
> >
> > > --- In SkunkworksAMA_at_yahoogroups.com,
> > > ShinkuuForceZERO_at_a... wrote:
> > > > It's your motherboard Jim, it's been fried. I know
> > > because a storm
> > > did the
> > > > same to my own & I went a week without a
> > > functioning comp.
> > >
> > > Turns out it wasn't anything _quite_ so drastic as
> > > that. Apparently,
> > > when the power went off (which only lasted maybe 2-3
> > > seconds), the
> > > system was writing something to the registry (this
> > > is what was
> > > explained to me while trying to fix the problem).
> > > The computer never
> > > knew the power went out, since it was still on when
> > > the power
> > > returned. In any case, I had to install another
> > > version of XP on the
> > > HD in order to gain access to the drive. I
> > > copied/moved whatever files
> > > I _had_ to have onto another drive. I will be
> > > reformatting the HD and
> > > installing a fresh copy of XP later today, I hope.
> > > Then I will simply
> > > have to reinstall the different programs I used.
> > > Shouldn't be too bad.
> > >
> > > --JMH, famous last words...
> > >
> > >
> > >
> >
> >
> >my strength and my sanctum are found in my solitude.
> >
> >Ich bin ein Ausländer.
> >
> >
> >
> >__________________________________
> >Discover Yahoo!
> >Stay in touch with email, IM, photo sharing and more. Check it out!
> ><http://discover.yahoo.com/stayintouch.html>http://discover.yahoo.com/stayi
>
> >ntouch.html
> >
> >
> >----------
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Received on Sun Jun 05 2005 - 13:53:14 CDT