PSU 650w is this up to the job ?

Discussion in 'Power Supplies and UPS's' started by ralphie7, Jan 6, 2011.

  1. ralphie7

    ralphie7 Geek Trainee

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    Can you help me please?
    I am in the process of building a pc . This is my second build ( no problems with the first ) but i am having a problem with this one.

    The pc would not boot up and after investigation I found the cpu fan not to be working. So I got another fan (out of an old pc) and plugged it into the cpu fan socket. this fan worked fine.

    So i thought my problem was the cpu fan being faulty.
    I then tried plugging the new cpu fan into another fan socket . The cpu fan worked fine in this socket. So the cpu fan can't be faulty.

    So I am thinking the fan must be ok and the socket must be ok . So why won't it work when plugged into the cpu socket ?

    Another problem i have is that the cd dvd combo drive lights up but the door won't open when the button is pressed. It does open if i use a paperclip in the tiny hole on the front of the drive but in immediately closes.

    I am thinking that it might be my PSU that just isn't up to the job but i aren't 100% sure and would like your opinions please.
    I don't really want to buy a bigger more powerful PSU and then find that this didn't cure my problems.
    Many thanks


    the bulid spec is :

    Antec 300 case
    Gigabyte GA-890GPA-UD3H
    AMD Phenom II X4 955 Black Edition Socket AM3 3.2 GHz
    Arctic Cooling Freezer 7 Pro rev 2
    Benq G2222HDL 21.5" LED Monitor
    Seagate ST31000528AS 1TB Hard Drive SATAII 7200rpm 32MB Cache
    Logitech X-210 Speakers - 2.1 Channel 25W RMS
    2 x Crucial CT51264BA1339 4GB, 240-pin DIMM Upgrade for a Giga-Byte GA-890GPA-UD3H
    4 x 120mm Case Fans

    the PSU i have fitted isn't new its about 2-3 years old its a
    Antec TruePower Trio 650W PSU - With 3x 12v Rails and 120mm Fan
     
  2. ralphie7

    ralphie7 Geek Trainee

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    I have got an old pc and put it side by side with the new pc. I have connected the wires from the CD/DVD drive in the old pc to the CD/DVD combo drive in the new pc and the CD/DVD drive door opened perfectly. So I can conclude that the drive is fitted and working ok.

    The monitor from the New pc I connected to the old pc and that works ok. So the monitor is ok.

    I have disconnected two of the case fans and removed the Ram and then retried booting the new pc. The cpu fan still doesn't start although if I flick it with a pencil it then starts and keeps going. The two case fans that came fitted in the Antec 300 have speed controllers on them . they will only start to work if set at the fast setting. Once they are going you can turn them down to medium or slow and they keep going but they will only start at the fast setting when the pc is booted.

    So i am thinking its the psu that is at fault
    any suggestions as to a replacement unit ?
     
  3. daz

    daz Geek

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    I would suggest, disconnecting everything from the motherboard. Live only CPU and fun and UPS. then see if it working.
     
  4. Wildcard

    Wildcard Big Geek

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    Hi,

    I have had good luck with the thermaltake toughpower power supplies (have 2 that are still going after 4 years of use each). I also have a pc power and cooling power supply in my gaming computer which has had no problems since I got it 3 years ago. I would recommend either brand. :)
     
  5. ralphie7

    ralphie7 Geek Trainee

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    thanks for the replies
    wildcard
    thanks for the recommendation i will make a note of that.
    Thing is i don't think its the psu that is the problem now.
    i have tried another psu in the pc. It was taken out of a working pc

    Doing this did cure this fault :-
    The cpu fan problem was still the same and the dvd problem was still the same.

    I have read on Google that some cpu fans only turn on when the cpu gets to a certain temp.
    is this true ?

    How can I check if this is the case ?
    won't i fry the cpu ?
    if its true then it could explain the cpu fan but not the dvd problem.


    daz

    thanks for the reply. I will give that a go today.

    thanks
     
  6. Ghostman 1

    Ghostman 1 Moderator Staff Member

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    First of all, are all your stuff you are using for the new build NEW ? What is the make of this Motherboard ?? you need to start from square one and first make sure that the Motherboard is Good.
    then test all other stuff.
     
  7. ralphie7

    ralphie7 Geek Trainee

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    Hi Ghostman
    yes all the parts are NEW in the build except the PSU
    and I have tried 2 different PSU's both taken out of working pc's

    the bulid spec is :

    MID TOWER CASE = Antec 300
    Motherboard = Gigabyte GA-890GPA-UD3H
    CPU = AMD Phenom II X4 955 Black Edition Socket AM3 3.2 GHz
    CPU FAN = Arctic Cooling Freezer 7 Pro rev 2
    MONITOR = Benq G2222HDL 21.5" LED Monitor
    HARDRIVE = Seagate ST31000528AS 1TB Hard Drive SATAII 7200rpm 32MB Cache
    SPEAKERS =Logitech X-210 Speakers - 2.1 Channel 25W RMS
    RAM = 2 x Crucial CT51264BA1339 4GB, 240-pin DIMM Upgrade for a Giga-Byte GA-890GPA-UD3H
    SYSTEM CASE FANS = 4 x 120mm

    the PSU i have fitted isn't new its about 2-3 years old its a
    Antec TruePower Trio 650W PSU - With 3x 12v Rails and 120mm Fan
     
  8. Ghostman 1

    Ghostman 1 Moderator Staff Member

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    So the CPU fan works, just not on the new build on the Gigabyte motherboard ... Will it work if you change the CPU fan plugin to the systems fan plugin ? It sounds like the Motherboard CPU fan plugin is bad.. This happens sometimes, Heck I have seen almost everything after building over 100 pc's..
     
  9. ralphie7

    ralphie7 Geek Trainee

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    hi Ghostman

    The cpu fan works if i plug it into a system fan header but not in the cpu fan header.
    if i plug a system fan into the cpu fan header it works.
    its not logical
    i thought it was the cpu fan header - but it can't be if another fan works plugged in that header.
    i thought it was the cpu fan - but it can't be because it works if its plugged in another header.
     
  10. Ghostman 1

    Ghostman 1 Moderator Staff Member

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    Yea! This is strange ? I don't thing it would make a difference on what plugin you use, just as long as your fan on the CPU is cooling the processor.. I have even run the cpu fan straight from the power supply..
     
  11. ralphie7

    ralphie7 Geek Trainee

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    found this on eggexpert

    So thought i would check this out :-

    I have have taken out the cpu fan and removed the fan blades
    nothing looked amiss. No electrical smell. Refitted the blades and
    they definately clicked into place. Tried it again . Just the same.
    It works in the sysfan header but not in the cpu header.

    Connected the monitor keyboard etc
    and booted the pc flicked the cpu fan with a pencil
    it came on and stayed on.
    Nothing - nothing on the monitor at all.
    I don't think its even trying to post
    the monitor gave me a NO SIGNAL message.

    motherboard or cpu ?
    How do I check these out ?
     

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