Power supply (PSU) concerns

By truffles ยท 267 replies
Mar 5, 2002
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  1. raybay

    raybay TS Evangelist Posts: 7,241   +10

    What is your concern? Are therei previous posts that we have not seen?
  2. perzephone

    perzephone TS Rookie

    Compatible Power Supply - Sony VAIO Desktop?

    Hey all,

    I'm brand new here, so go easy on me :)

    I am in dire need of an affordable compatible power supply for a Sony VAIO PCV-RS620G. The part # I have is 1-468-709-22 & from what research I've done, I see the 'new' part number is now 1-468-709-23.

    I've searched e-Bay & various other spots on the 'Net, but buying a full computer for parts is a little out of budget right now, and places that I don't fully trust are asking over $100 for the Sony power supply itself.

    (When we bought the PC, I was mostly worried about being able to upgrade things like video/audio/memory. Never thought about the full implications of proprietary HARDWARE!)
  3. raybay

    raybay TS Evangelist Posts: 7,241   +10

    Get the substitute power supply from China. Cost": $11 to $19. They work great and we have never had one fail. These are sold on eBay... just shop carefully so you don't buy the first expensive one... but wait for the right price.
  4. GaGa

    GaGa TS Rookie

    I`m having a problem with my PSU it makes a Buzzy sound "very low sound you have to get near it to hear " , but what is weird that the sound doesn`t stop even after shutting down the PC or switching the PSU off , i have to disconnect the electricity completely from the PC .
    is this normal ?
  5. kimsland

    kimsland Ex-TechSpotter Posts: 14,523

    Um no

    Please replace the faulty Power Supply ;)
  6. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    This noise is usually given off by transformers with failing laminations (between the coils) so it is only a matter of time before it fails. As Kimsland says, replace it now. It might cause more damage when it does give up.
  7. tipstir

    tipstir TS Ambassador Posts: 2,477   +126

    When I had clients who reported noises like this. Usually something was missing. Screws need tightening or drop some 10-40 oil onto the fan bearing. But today the internal fans do wear out. The more Power requires these PSU will start to make noises. Some will start to fail or just shut off on you. Sounds like your PSU is starting to go as mentioned by other member here.
  8. raybay

    raybay TS Evangelist Posts: 7,241   +10

    We do not recommend a drop oil on a power supply fan bearing. PSU bearings do not require oil on any brand or model we have examined, and the oil cannot get into the bearing. The oil inside the power supply case is thrown around and can cause other sometimes severe problems.
    As for the noise, first re-arrange the cables in your case as sometimes the noise is nothing more than a rattling of a cable against th PSU case. Usually, though, it is a problem in transformer or diode electronics
    Whatever else may be the problem, replace the power supply. Delay can cause failures which can damage other components... or simply stop your computer at an unwanted moment.
  9. kimsland

    kimsland Ex-TechSpotter Posts: 14,523

    I've successfully oiled many noisy PSU fans, and then put the grommet seal and sticker back on

    But the Power Supply is a sealed unit that holds power even when unplugged
    It is not recommended to ever service a Power Supply, and will definitely void warranty from doing so


    Oh and by the way, I don't even think its the fan, I think its one of the capacitors, of which is even more dangerous
  10. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,244   +234

    I've taken a noisy fan and soaked it in WD40 for a few minutes. Placed the fan on a towel and let if "drain" for a while. Then reinstalled it. Fans treated like this have quieted down for over a year, but as kimsland has said, it is either a "loose" transformer or coil and maybe a "blown" capacitor that is making the buzzing sound, that GaGa is talking about
  11. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    I have also fixed them with a careful application of what my Dad used to call "Lark Oil" - so fine you could lubricate a lark with it. In fact it is clock oil and perhaps a bit too fine for this - but still anyone prodding about in the guts of a PSU should bear in mind that there some fat fully charged capacitors in there with enough belt to kill. No kidding. Stone dead.
  12. BlindObject

    BlindObject TS Rookie Posts: 412

  13. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    The Corsair offers a little more power on the +12V rails (about 70W more than the Antec) but the build quality is better on the Antec unit, and since it's modular, that makes it the better choice.
  14. BlindObject

    BlindObject TS Rookie Posts: 412

    I see, the Antec didn't get as good of reviews as the Corsair did. I will soon power two GTX260s and another HDD and fans.

    Since the Corsair only has one 12V rail, does that make it easier to SLI? If any difference?
  15. raybay

    raybay TS Evangelist Posts: 7,241   +10

    We totally disagree that the Antec is a better build, based on the number of failures we see. Certain Antecs are problems.
    The Corsairs are great, reliable, and problem free in our experience. I doubt you will not see a performance difference nor a reliability one because of the one 12V rail.

    If you want a better power supply than the Corsair, do not make it an Antec.
  16. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    That particular Antec is an Enhance-built unit, which are built far better than the CWT PSH-based Corsair unit. Both are very good units, though I have yet to see evidence of a PSH-based design outperforming an Enhance-built unit.
  17. BlindObject

    BlindObject TS Rookie Posts: 412

  18. raybay

    raybay TS Evangelist Posts: 7,241   +10

    Different strokes for different folks... I have seen a failure with that Antec, and have not seen any Corsair failures... yet... So there you are. We like Corsair, Seasonic, FSP Group, PCPower and Cooling, Sparkle, and a few others... but only a few of the Antec, OCZ, CoolerMaster, Enermax, ThermalTake, and a few others...

    I suspect it is the luck of the draw for reliability... All of our choices have been great for gamers... long term reliability is a different issue.
  19. BlindObject

    BlindObject TS Rookie Posts: 412

  20. raybay

    raybay TS Evangelist Posts: 7,241   +10

    That will work for you... the price is right for a 1000 Watt power supply, but you would be fine with the FSP Group Everest 600 ATX 2.2 and EPS 2.91 600W Computer Power Supply PPA6000600, 80 PLUS Certified, SLI Certified, Active PFC
    at www.directron.com for $84.99.
    The Hec is good equipment... as are many, many others in that price range.
  21. Quantex_rox

    Quantex_rox TS Rookie Posts: 123

    Buzzing noises are most often caused by coil whine, where the current passing through the wire in the coil will cause the core to vibrate at a audible frequency. This is a common problem on corsair psu's mixed with certain video cards/motherboards.

    Capacitors almost never cause whining. The only time they do this is if the PI filter's core is loose and the capacitor is in or near failure mode and causing more ripple to pass through the pi filter.

    Capacitors are hardly dangerous if you know what you are doing, most good quality power supplies, even cheap ones, discharge in a couple of minutes, but you should check the voltage across the bridge rectifier just in case.

    As for HEC psu's. Ehhhh. The cougar power's sold in Europe are pretty good, but the HEC cougars as well as other HEC's are not very good at all. I would stay away.
  22. Aximilator

    Aximilator TS Rookie Posts: 63

    Just make sure you dont fry anything!!!
  23. Jamesqin

    Jamesqin TS Rookie Posts: 30

    Hi guys,
    I recently decided to upgrade my graphic card (I curently run only integrated HD 3200) to Gigabyte radeon HD 5850, but my psu only has like 270W which is obviously not enough.. Here are other specs of my PC:
    1. Motherboard - ASUS M3A78 PRO
    2. Graphic interface - ATI Radeon HD 3200 Graphics -> going to be Gigabyte Radeon HD 5850
    3. Memory -2048mb (dual)
    4. CPU -AMD Athlon 64 X2 5600+
    5. CPU Speed -3097 (overclock from 2900) / bus speed: 213,6 MHz
    6. Power Supply Make/Model - curently 270W
    7. OS: Windows XP Prof. 32bit

    since I still use xp and doesnt have such hi-tech PC 500 or 550W should do right ? I was thinking maybe: "Arctic Cooling Fusion 550, bulk" that seems nice in terms of performance/price...
    thanks for any help!

    btw I dont have to worry about PSU going along with my motherboard right ? I know that it is noobish question, but better be sure than sorry :)
  24. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    450 watts is probably enough for that if you get a good one!
  25. You don't have the right motherboard model name there,the Asus M3A78 isn't an integrated board( i know because i owned a M3A78).

    A 500\550w psu will be more than enough for the 5850.

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