Antec sonata2 450w

Have the Antec Sonata II with bundled Antec PSU (450W). Now I noticed the outside fan of this PSU never rotates at all, while the inner one runs at 1250-1300RPM.

Something to worry about? Works fine with neat temperatures (CPU 32-42, MB 38-45C). MB is Asus M4A78-VM (AM2) with AthlonIIX3 425, internal Radeon HD320 graphics and a Hauppage PVR150 TV-card. One WD 500Gb HDD and a CD/DVD RW+.

The PC is not overclocked, never gaming :non:

Should I start looking for another PSU, given all complaints about this bundled PSU?
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More about antec sonata2 450w
  1. That would indicate that the PSU isn't running hot enough to engage both PSU fans. As long as everything to functioning properly, I wouldn't worry about it. To see if that fan ever works, just load the system with a benchmarking tool (many free ones available) and observe whether the fan works or not. If not, start looking for a quality PSU.

    Good luck!
  2. COLGeek said:
    That would indicate that the PSU isn't running hot enough to engage both PSU fans. As long as everything to functioning properly, I wouldn't worry about it. To see if that fan ever works, just load the system with a benchmarking tool (many free ones available) and observe whether the fan works or not. If not, start looking for a quality PSU.

    Good luck!


    Tnx! Do you know for sure that the standard Antec 450W PSU has this capability to NOT use the outer fan? How could I possibly check this?
  3. My ancient antec 350w does the same thing. So I wouldn't worry about it.
  4. Thanks for stimulating me not to worry; still I would like to konw if the not-working outer fan is within normal operating procedures for this fan.

    Speedfan does report a acceptable value, as the PSU fan is connected to the right connector (PWR FAN, 3 pins)) on the MB M4A78-VM (AM2).
  5. If you can touch the ps outer shell without burning your finger, then you're fine. Most onboard fan monitors only give rpm readings for one fan with a ps lead going to the motherboard. It doesn't monitor both fans. If you're worried about temps, you can always get a cheaper brand of ps that has a noisy fan that always runs on high. I'll take my antec any day for the quieter fans.
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