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How dangerous are power sags/brownouts?

post #1 of 8
Thread Starter 
My brother has his own computer (it's running an athlon 7750 or something like that, a radeon 4850, 4GB DDR2, and one 5400 WPM hard drive)

And his computer is on the same circuit as mine. I was wondering if it could harm my PC when he turns on his because it might create a power sag or something? My PC's connected to a pretty good surge protector, but obviously those don't do anything for power sags.
post #2 of 8
actually there is a lot of information available I read somewhere
that your home or office building electrical system can have up to 40 minor surges a day as
appliances etc turn on and off
the Power Plant sending electric to you has 2-3 major surges a year couple with several minor
one's during a given week-month look it up you will find more accurate info
oh I wasnt paying attention I know nothing of sags.
Edited by snot - 1/15/11 at 8:28pm
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post #3 of 8
No, that's not an issue. First of all, another computer getting turned on does not create such a sag that it's even worth mentioning. Fridges and AC units are a lot worse in that regard, and they don't harm computers either, or at least not those with good power supplies. Indeed power supplies have a filtering stage that is there precisely for that reason as well as for surge protection. You read that right, if you have a good PSU you don't even need a surge protector because all the surge protection components are inside the PSU. Of course you plug other things into your surge protector as well, but I'm just saying.
post #4 of 8
Thread Starter 
Quote:
Originally Posted by Shub View Post
No, that's not an issue. First of all, another computer getting turned on does not create such a sag that it's even worth mentioning. Fridges and AC units are a lot worse in that regard, and they don't harm computers either, or at least not those with good power supplies. Indeed power supplies have a filtering stage that is there precisely for that reason as well as for surge protection. You read that right, if you have a good PSU you don't even need a surge protector because all the surge protection components are inside the PSU. Of course you plug other things into your surge protector as well, but I'm just saying.
I see. So, is my EA650 a good PSU in this regard?
post #5 of 8
redundancy never hurt an electronic componen that I am aware of
besides surge suppression component can only suppress so many
surges before they are wiped hence the roughly estimated refernce
to surges I posted above that is why they are only rated for certain
amount of time ie. 3y, 5 y etc
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post #6 of 8
I would much rather fry a surge suppressor than my pc power supply reputation theory or not
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post #7 of 8
I've never actually killed anything with this, but it is observable for sure.

For example, the lowest bidders wired up this apartment in 14AWG and I have a laser printer that I measured a startup wattage of about 900 watts on. Its definitely a tax on the wire. Worst of it is, the room behind it has my roommate's computer - and although it by itself doesn't take much power, if I print something when he's in call of duty... his room fan slows down, he cries "NOOOOOOOO...." and then his computer goes into standby.

Heck of a way to find his battery backup won't hold a charge anymore LOL

As for two computers on the same wire... how about an analogy from college. We had ONE plug behind the beds. Ran an extension cord and plugged in: tv, fridge, a playstation, two computers, two printers, two fans, two desk lights, my surround sound speakers... I think that was about it. That building... 1100 rooms built at a TECHNICAL school I swear was 92% computer science geek and they all had a single plug behind the bunks. It's a wonder it never burnt down. Shoot one guy had computers operating the window shades and the door and the room lighting and who knows what else- that room looked straight out of the Matrix.
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post #8 of 8
Quote:
Originally Posted by TrueOptic View Post
I see. So, is my EA650 a good PSU in this regard?
As far as I know, yes. It's got all the right components.
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