Possible PSU Failure?

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  1. Posts : 11,424
    Windows 7 Ultimate 64
       #61

    ICit2lol said:
    madcratebuilder said:
    Voltage is only part of the psu output equation. You have to know what it is putting out in current, or amps. A psu may test with good voltage readings but fail on amp output causing all sorts of problems. You can test for amps with a multimeter but it well require a shunt. Good meters may have a internal shunt capable of up to 10 amps or so, but nothing close to what a pc psu can supply. Having a "test" psu available can save hours of troubleshooting. It doesn't need to be a real expensive high end unit, several good options in the sub $50 area.
    Which is what I have been saying all along Mad and yes I have had some more expensive multimeters that will read up to 20A in DC and 10A in AC. There are to ones that do "clamp" around the cable but are usually quite expensive and not what we would probably want for our purposes because they measure AC current only How does a dc clampmeter work? | Electrotechnik - The Website on Electrical Engineering
    I think getting a reading like this could just be a Fluke !
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  2. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #62

    I still believe in a single rail. My GPU requires a minimum 450W PSU, or 37.5W. Your 1000W has only 30W on each rail, I couldn't use it. My 650W Corsair though with one 12V rail has 52A available, plenty enough for the GPU and board and RAM and optical drives.

    The PG signal is generated by the PSU if it passes its internal tests and then is sent to the CPU. If the signal is enough the CPU timer chip takes it out of a reset configuration and the thing starts up. The CPU can't generate any power.
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  3. Posts : 1,686
    Windows 7 x64 Ultimate and numerous virtual machines
       #63

    Britton30 said:
    I still believe in a single rail. My GPU requires a minimum 450W PSU, or 37.5W. Your 1000W has only 30W on each rail, I couldn't use it. My 650W Corsair though with one 12V rail has 52A available, plenty enough for the GPU and board and RAM and optical drives.

    The PG signal is generated by the PSU if it passes its internal tests and then is sent to the CPU. If the signal is enough the CPU timer chip takes it out of a reset configuration and the thing starts up. The CPU can't generate any power.
    Yep I got that backwards, probably the drugs for the pain.
    Watts = Volts x Amps, Amps = Watts / Volts Volts = Watts / Amps
    I think you mean 30AMPS Only 30 AMPS? I am powering 6 hard drives, 7 fans, a Blu ray DVD drive and 8 core CPU and 16GB of ram. The video card is a Radeon 6770 Gigabyte silent GIGABYTE - Graphics Card - ATI - PCI Express Solution - Radeon HD 6000 series - GV-R677SL-1GD which needs a 75 Watt connection, that is 6.25 amp.. The 30 amp 12v rails will deliver 360 watts each. I still have 2 12 Volt rails unused for another video card or whatever. Single rail power supplies are fine until something goes wrong and all the current goes somewhere. My power supply could start my car......
    There is nothing wrong with either solution as long as you buy a GOOD quality brand and never use the PSU you get free with the case.
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  4. Posts : 21,007
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       #64

    Indianatone said:
    Just to clarify something which some of you may not be aware. The power good signal is generated by the motherboard to let the PS know the motherboard is happy with the supplies it is getting, if that signal is out of range the PSU is 99% of the time defective 1% of the time the motherboard is the issue.
    Gary I do not agree on you 12v single rail. In the event of a short there is no current limiting and bang goes all your stuff with 100 amps through it. I always use Enermax PSU. I put this baby in my upgrade I have done in the time this thread has been going....ENERMAX ERV1000EWT-G 1000W ATX12V v2.3 / EPS12V v2.92, v2.8 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply - Newegg.com
    Sorry Jack for hijacking yet again but I felt I needed to respond.
    Actually Indie I think you will find the Power_Good is generated in the PSU using it's own internal self test and sent to the mobo via pin 8 (grey cable on the 24 pin) it typically has to be at minimum 2.4v and max at 6v or the timer chip will not allow the boot up Voltage Rails - Power Supply 101: A Reference Of Specifications
    On the rail issue I am not sure any more on what and where because if there is more than one +12v rail and it has to be independent of the other rails then it has to have it's own dedicated rectification circuit?? So if you have say four rails that means four separate rectifiers??
    Am not trying it be pedantic but the text does state that about Power_Good:)
      My Computer


  5. Posts : 1,686
    Windows 7 x64 Ultimate and numerous virtual machines
       #65

    ICit2lol said:
    Indianatone said:
    Just to clarify something which some of you may not be aware. The power good signal is generated by the motherboard to let the PS know the motherboard is happy with the supplies it is getting, if that signal is out of range the PSU is 99% of the time defective 1% of the time the motherboard is the issue.
    Gary I do not agree on you 12v single rail. In the event of a short there is no current limiting and bang goes all your stuff with 100 amps through it. I always use Enermax PSU. I put this baby in my upgrade I have done in the time this thread has been going....ENERMAX ERV1000EWT-G 1000W ATX12V v2.3 / EPS12V v2.92, v2.8 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply - Newegg.com
    Sorry Jack for hijacking yet again but I felt I needed to respond.
    Actually Indie I think you will find the Power_Good is generated in the PSU using it's own internal self test and sent to the mobo via pin 8 (grey cable on the 24 pin) it typically has to be at minimum 2.4v and max at 6v or the timer chip will not allow the boot up Voltage Rails - Power Supply 101: A Reference Of Specifications
    On the rail issue I am not sure any more on what and where because if there is more than one +12v rail and it has to be independent of the other rails then it has to have it's own dedicated rectification circuit?? So if you have say four rails that means four separate rectifiers??
    Am not trying it be pedantic but the text does state that about Power_Good:)
    I know John, I am not sure what Iwas thinking......Power good always comes from the PSU to the system control micro no matter what device. I was pain killered up.
      My Computer


  6. Posts : 21,007
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       #66

    No probs Indie.
      My Computer


  7. Posts : 259
    Windows 7 Ultimate x64
    Thread Starter
       #67

    Hey Everyone,

    Just wanted to give you all an update. I ordered a new PSU and a few other components last week and I just finished installing them this morning. I have been on my computer most of the day running stress tests and installing updates. The good news is it hasn't crashed once! All my temps and votlages are normal and I would have to say that this is resolved. My GPU seems to be stable and happy, so I would have to say that it was my old PSU that was the source of the issue.

    I want to thank you all for the help and sticking with me on this. I even enjoyed your bickering because it was very informative and I learned a lot. You guys are the best!

    Thanks Again,
    Collin
      My Computer


  8. Posts : 21,007
    Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
       #68

    Good stuff Colin had to be that mate:)
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  9. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #69

    Good to hear that Collin, enjoy the PC now.
      My Computer


  10. Posts : 11,424
    Windows 7 Ultimate 64
       #70

    Great news Colin and it proves the PSU is the heart of any rig !
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