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When to buy a new power supply

by paulchwd / February 2, 2008 1:38 AM PST

Windows XP Pro SP2 32 bit
Pentium 4 2.8 Ghz
3 GB of RAM running in dual channel
2 HD's (1 PATA 80GB 1 SATA 300GB)
DVD RW drive (a few years old)
ATI TV Tuner Elite
ATI RADEON 9200 Video Card

I've had my power supply a year and a half (Since Sept 06)when i purchased my custom built PC. It makes lots of noise. The other day the sound it was making was not the norm it was bad enough i had to unplug the PC. Every time i restarted same grinding noise (very loud) ... not sure but think i smelled burnt circutry. .... Should I get a new new one ? Now its making its normal noise.... ps I cleaned it with compressed air but had no effect

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Grinding noises and smell = It's time.
by R. Proffitt Forum moderator / February 2, 2008 3:15 AM PST

When you replace it, consider adding 100 Watts to the rating.


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Further question
by paulchwd / February 2, 2008 6:14 AM PST

Thanks... i figure i'd get a 300 watt one as all it has plugged into it is @ HD's and a DVD RW

... so then a 300 watt one draws about 400 watts ?

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by R. Proffitt Forum moderator / February 2, 2008 6:26 AM PST
In reply to: Further question

Try one that supplies about 400 Watts to extend the time till you replace it again...

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(NT) ASAP, replace psu before its too late
by Willy / February 2, 2008 5:28 AM PST
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by paulchwd / February 2, 2008 9:28 AM PST

What benefit does the added wattage have

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If and when...
by Willy / February 3, 2008 2:06 AM PST
In reply to: wattage

The system draws the added wattage if and when it needs it, like a reserve. But, its important to understand even a "rated watts" value of the psus shouldn't approach that value too often as added heat and stress on a constant demand will strain the psu all too quickly. Thus, shorten its life cycle, there will be times it reaches or exceeds such a rated value but a decent psu will survive. A cheap psu will surely prove itself to be so. The added wattage thus is left in reserve and the constant wattage demand should be at least 75% as a good rule of thumb, but the 82% is the industry desired std..

tada -----Willy Happy

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replace power supply
by jbeck918 / February 3, 2008 2:26 AM PST

I recently replaced my p/s for exactly the same reason...Found a 600 watt p/s for $50 at Replaced p/s and started pc and guess what ... same noise... finally traced it to the tiny little fan on video card... bought replacement at radio shack for $5 and all is well. Glad I replaced my 4 year old 350 watt p/s even though it wasn't the problem.Now I have all the power this pc will ever need,for $50.If you have any question about p/s at all,I recomend replacing it,really it's short money insurance.

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