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Does home electric wiring have anything to do with the wattage my computer pulls?

post #1 of 27
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I might be getting a 6950 soon as it is the closest upgrade from a 5870, and I was planning on going 5970+5870 but I guess that won't happen now. So in that case I might be crossfiring a lot sooner than I thought. My rig will pull a good 750w, will this be an issue for my house? I use a surge protector. Sometimes when my sister uses a blowdryer the lights dim a bit, I am just wondering if my computer will have the same effect under load. Thanks!
    
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post #2 of 27
Meh... maybe... I doubt it'll be an issue. However, which brand and model PSU do you have?
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post #3 of 27
It should not. But that depends on the circuit your plug is wired too and how many othe outlets are on it and how much draw there is on them.
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post #4 of 27
Depends on if your house is up to code, on whether or not it can do it safely. I think there are some areas where an outlet only has to allow 10 amps, but 15 amps should be for most outlets. The fact that a hairdryer can cause the lights around the house to go dim is a bad sign. Last place I lived I RMA'ed a motherboard a month and it did the same thing, but with the washer and dryer. Since moving out of there, no power related issues since.

Now if when she turns on the hairdryer, justthe bathroom lights dim, then hopefully it is a localized issue. Which is probably normal since I wouldn't be surprised if bathroom outlets deliver less amperage for water safety reasons.
Edited by joemaniaci - 3/12/11 at 10:24pm
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post #5 of 27
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Meh... maybe... I doubt it'll be an issue. However, which brand and model PSU do you have?
It's a quality Mushkin 1000w, which includes STOCK sleeving, STOCK connectors, and stock screws.
    
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post #6 of 27
The amount of power that your computer uses is not effected by the wiring in your house. However, whether or not your house is able to supply the load required by your computer is another question. Also, depending on the hair dryer, it could be drawing 2000W or more, so you wont be approaching this even under max load.
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post #7 of 27
Quote:
Originally Posted by Xazen View Post
The amount of power that your computer uses is not effected by the wiring in your house. However, whether or not your house is able to supply the load required by your computer is another question. Also, depending on the hair dryer, it could be drawing 2000W or more, so you wont be approaching this even under max load.
+1 , 750W is a pretty small load as far as houses are concerned. As a general rule though I wouldn't plug any high load device (like a space heater or hairdryer into the same socket (preferably not the same circuit either). Having said that as long as you're not tripping a breaker and as long as you have a quality PSU you should be fine. Breakers are typically 20A circuits i.e. 2400W. The idle to full power load change on your computer probably won't be more than 400-500W worst case (more like 300W I expect) which is a lot less than a hairdryer. In addition it's further smoothed out by the PSU whose capacitors will take the edge of the surge.
Edited by stren - 3/12/11 at 10:33pm
     
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post #8 of 27
Quote:
Originally Posted by Lostintyme View Post
It's a quality Mushkin 1000w, which includes STOCK sleeving, STOCK connectors, and stock screws.
Then I think it will be fine.

I had a brownout recently while I was at my computer, but it stayed on and the monitor even stayed on without dimming. The only difference I noticed was that my fans slowed down. But I panicked and shut it down, which I was even able to do properly!

So once the power came back to 100%, I asked Phaedrus2129 about it and I learned that the brownout was harmless because I have a switching PSU. In addition, my monitor has a switching PSU too. He said that even when the brownout caused the power to be reduced to like 30-50% or whatever it was, I could have been gaming and I wouldn't have been interrupted. Well, I lost my internet connection because neither my router or cable modem have switching power supplies, but still.

So even major power fluctuations are harmless to good PSUs. I think it has something to do with having Active Power Factor Correction (PFC) or something like that.

So, I'm trying to say that even if she turns the hairdryer on while you're gaming, your system may not even notice.
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It's a computer!
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post #9 of 27
Quote:
Originally Posted by joemaniaci View Post
Depends on if your house is up to code, on whether or not it can do it safely. I think there are some areas where an outlet only has to allow 10 amps, but 15 amps should be for most outlets. The fact that a hairdryer can cause the lights around the house to go dim is a bad sign. Last place I lived I RMA'ed a motherboard a month and it did the same thing, but with the washer and dryer. Since moving out of there, no power related issues since.

Now if when she turns on the hairdryer, justthe bathroom lights dim, then hopefully it is a localized issue. Which is probably normal since I wouldn't be surprised if bathroom outlets deliver less amperage for water safety reasons.


Seriously, if you do not know anything on the topic as fact... please just do NOT respond. I had to laugh at the last sentence. Dimming lights from turning on a hair dryer or a washer and dryer are no indication of anything other than the way AC type electricity works.


To better answer the OP's question, as said it depends on what all else is on that same circuit ...IE breaker / fuse. If in doubt you might do some self checking and find out by turning off the breaker to see what all else is on the circuit your plugged into. Some houses had poor design in the make up of how the circuits would be handled, which works fine as long as there are not multiple heavier pulling appliances plugged into them.
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post #10 of 27
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
Then I think it will be fine.

I had a brownout recently while I was at my computer, but it stayed on and the monitor even stayed on without dimming. The only difference I noticed was that my fans slowed down. But I panicked and shut it down, which I was even able to do properly!

So once the power came back to 100%, I asked Phaedrus2129 about it and I learned that the brownout was harmless because I have a switching PSU. In addition, my monitor has a switching PSU too. He said that even when the brownout caused the power to be reduced to like 30-50% or whatever it was, I could have been gaming and I wouldn't have been interrupted. Well, I lost my internet connection because neither my router or cable modem have switching power supplies, but still.

So even major power fluctuations are harmless to good PSUs. I think it has something to do with having Active Power Factor Correction (PFC) or something like that.

So, I'm trying to say that even if she turns the hairdryer on while you're gaming, your system may not even notice.

Thanks, REP+ to all
    
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