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need help on what power supply to buy??

by howell / September 2, 2004 1:27 AM PDT

i'm planning to change my power supply because it is shuting off by itself, and i'm thinking that my power supply has something to do w/ it.I dont have worm on my pc i have scan it w/ my antivirus. what is the best power supply that suit my hardware? and by the way my budget is only($40 to $60).

this is the specification of my pc

processor: P4 2.40GHz
motherboard: asus P4S8X
memory: generic 256ddr
video card: nVIDIA geforce4 ti4800
harddisk: 40gig seagate 5400rpm
40gig seagate 7200rpm
cd/dvd rom: asus 16x dvd rom

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Re: need help on what power supply to buy??
by R. Proffitt Forum moderator / September 2, 2004 1:36 AM PDT
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Re: need help on what power supply to buy??
by Willy / September 2, 2004 2:18 AM PDT

The p/s unit is the most underrated device in your system and while it may appear "non-glamourous" it does whatever it takes to get things done. You can find many a brand out there for under $60, but I suggest you look at Enermax and Antex(sp) units for a truly stable output and they may cost more but not that much when you consider how it supports the overall demands of the system. I further suggest you get a 2-fan p/s unit for better cooling. Google for the price range, etc. but get at least a 350W or better, 400W being preferred.

good luck ------Willy Happy

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sure of the cause?
by frankzxcv / September 2, 2004 2:29 PM PDT

are you sure this isn't a temperature problem causing the shutdown? oh well -- if your PS isn't big enough, may as well replace it. I have an enermax that has served me well - reasonably quiet. --fj

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Re: need help on what power supply to buy??
by ITVern / September 2, 2004 9:00 PM PDT

It may not be the power supply at all. If it is not, then replacing it probably won?t help. I would say to look at your power options in control panel first to be sure it is not set to power off after a certain time. You should also check the power settings in the BIOS. If you do get a new supply, don't bother with anything lower than a 400 watt.

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Re: need help on what power supply to buy??
by howell / September 3, 2004 3:35 AM PDT

i have check the power monitor on my bios. it seem that my voltage is varying form this values:

vcore voltage 1.52v-1.55v
+3.3v voltage 3.04v-3.05v
+5v voltage 4.97v-4.99v
+12v voltage 12.09-12.16v

and by the way the power supply i'm using is just 300w. here's my problem sometime when i turn on my pc it won't turn on i should slam it first before i can turn on.hehehe and sometimes pc turn on and i'm using it properly then it suddenly shutoff by itself, or sometimes i turn on then it is starting looping on and off. this causes my harddrive to have an bad sectors....

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Great way to burn up a motherboard. Here's why.
by R. Proffitt Forum moderator / September 3, 2004 3:41 AM PDT

Using a too small power supply causes the motherboard capacitors to work overtime. It also can contribute to BLUE SCREAMS OF DEATH (BSOD) with a variety of errors and as the power dips, you get hard drives marking bad sectors.

With proper size supplies being cheap, I always wonder why people fit such small units.


PS. Yes, it's Blue Screen Of Death...

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Re: Great way to burn up a motherboard. Here's why.
by TECHNU / September 3, 2004 4:02 AM PDT


It seems most ppl opt for the smaller to save price.

I would go with what everyone else has recommended so far. Enermax or Antec being good ones. Go for around the 400w minimum.


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Re: need help on what power supply to buy??
by jjcool / September 3, 2004 7:22 AM PDT

are you sure you arnt overheating those voltages you show are fine there all within the proper limit.

these are mine

vcore = 1.76
+3.30v = 3.28
+5.00v = 4.75
+12.00 = 12.22

on a second look may i just ask what proccessor you have the vcore looks a bit low.

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Re: need help on what power supply to buy??
by ozos / September 3, 2004 11:42 AM PDT

alright w/o you telling me I know you have an AMD Athlon or Duron CPU...Pentium 4 NW's run in the 1.5v range.

I will have to suggest the Forton Source 530W unit, another thing to look at...do you have your computer on a power strip? Try plugging direct into an outlet that has nothing else plugged into it (I know it causes surge issues, you also DO STILL NEED a higher wattage unit...I had a 450W with acceptable rails give me some trouble with that issue, I ordered up a Forton and now I just run direct to wall...I wonder if I needed the Forton)
but anyways I would try plugging into an un-occupied outlet and get a 400W+ unit, I would reccomend 530W unit from FSP...but then again I just love the power (but not the weight) of the FSP unit.

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