Psu broken or not enough power?

Hello.

I recently bought Silverstone nightjar 400w passive psu.
I have problems running system stable with it. Pc just randomly shuts down and fails to power up again.

Computer shuts down randomly, from 2 minutes to 30 minutes. It's not about cooling, I've tried open case + fan attached to PSU, same result, random shutting down.

I'm unsure, if the PSU is not powerful enough for my system, or is it simply broken.

System specs;
Q8200 core2quad, (TDM 95w)
Nvidia G210 (appr.30w)
2 sticks of DDR2 ram
3 7200rpm sata drives
3 usb devices taking power from usb-port
1 soundcard + addon card for it.
keyboard+mouse

System runs fine with 600w PSU and has run with 500w PSU, so the motherboard works fine.

Any suggestions, please?
5 answers Last reply
More about broken power
  1. well it seems you have isolated the problem to the psu already
    so my suggestion would be

    use another psu
  2. Outlander_04 said:
    well it seems you have isolated the problem to the psu already
    so my suggestion would be

    use another psu


    Thanks for writing.

    Yeah, that what I do, use different PSU.
    Please, what do you think about the wattage ? Is the PSU insufficient ?
    The Silverstone gives 324w on 12v rail.

    I ask this because I don't know if I should send the PSU for repair.
  3. Weird, 27A in 12v rail should be more than enough since CPU uses 12v rail.
    I think it could be sent to repair, but, do a noiseless psu required? if not, could u upgrade it to a powerful psu with fan?
  4. Ur PSU review:
    http://www.hardwaresecrets.com/article/SilverStone-Nightjar-400-W-Power-Supply-Review/869/1

    by this test the PSU should be working nicely with ur system
  5. vitornob said:
    Ur PSU review:
    http://www.hardwaresecrets.com/article/SilverStone-Nightjar-400-W-Power-Supply-Review/869/1

    by this test the PSU should be working nicely with ur system


    Yeah, that's what I calculated too, it should work nicely.
    I'll send the PSU to repair.

    I'll be using the computer in small room, which I use for audio recording, so silence is needed.
    The current psu does well though, but it's just that I know that there is silent psu... :)
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