cant tell if mobo is bad or psu

Hi I built my pc and it was running fine and I turned it off a few minutes in and tried turning it on but it wouldnt boot so I took everything out and had my mobo ram and gpu all hooked up to my psu and the hdtv to see if it would post. But it didnt post it wont turn the cpu fan however there is lights on my gpu and I tried removing all the parts and trying others and went through the list on this site if the pc wont start but I havnt gotten anywhere please help
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More about mobo bad psu
  1. Specs?
  2. Asrock z97 anniversary edition
    I7 4790k
    Asus r9 270x
    G. Skill 8 gig stick
    Corsair 600w
    Stock cpu heatsink
  3. The only weak point in your specs is the PSU.

    It's not Haswell compatble.



    When an Intel Core (i3, i5, i7) processor is idle, it goes into a sleep state that requires less power than when the CPU is active. Since the motherboard voltage regulation modules that provide power to the CPU gets their power from the power supply's +12V rail, these sleep states can dramatically reduce the load on the power supply's +12V rail.

    According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply's non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU's protection may prevent the PSU from running and will cause the power supply to "latch off". This will require the user to cycle the power on their power supply using the power switch on the back of the unit.

    While we are still working with Intel on the details of the testing methodology they use to check PSUs for Haswell compatibility, it is already known that a power supply that uses DC to DC for the non-primary rails (the +3.3V and +5V) will not have an issue with the new low power sleep states. This is because a DC to DC buck converter is used to convert +12V to +3.3V and +5V. This means that no matter what load the CPU puts on the power supply, there will always be a load on the +12V because the +12V is required to provide power to +3.3V and +5V.

    Corsair utilizes this DC to DC technology in most of their power supplies. Starting with the CX750 and CX750M and moving all of the way through the GS Series, TX and TX-M Series, the HX Series, both the AX Series Gold and AX Series Platinum, and the new AXi Series. So whatever your budget, if you choose Intel's new Haswell processor and wish to utilize the new, low power C7 sleep state, Corsair has a power supply for you.


    cosair.com
  4. Still shouldnt It be sufficiant for a post test?
  5. Yes , but the CX500 and CX600 are the 2 most returned supplies on the market.
  6. Well the cpu fan wont run at all and I tried flipping the switch but it did work before I had it in my case
  7. Get a new supply , CX series are very low end.
  8. What do you recommend?
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