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Asus Sabertooth X58 restarting every few seconds

I havently built my first computer and after turning it on it struggles to boot, constantly restarting itself every few seconds, with all fans etc working. After trying for so long and researching as much as I could, I was hoping I could find out the problem on here.

So here's what I found:

If I leave it unplugged for a while and retry, it stays on for longer, but eventually giving up and restarting itself repeatedly.

Probably the most important thing I discovered is that when I unplug the 8 pin and turn it on, it stays on without restarting, and I tried it a few times to make sure.


I have tried a lot of solutions people have suggested and removing the 8 pin is the only one which made a difference, I'm just not sure whether this means a faulty psu, cpu, or motherboard.

Any help is appreciated
12 answers Last reply Best Answer
More about asus sabertooth x58 restarting seconds
  1. I have recently*
  2. What PSU?

    Actually; what is your whole setup? videocard and all
  3. make sure you have the ram in the correct slots for booting. if there in the wrong slot the system will constantly boot cycle.
  4. I have a 750w psu from novatech
    8GB crucial RAM
    i7 965
    Asus GTX 660 2GB
    500GB Hitachi HDD
  5. I've tried with the RAM in every slot and no difference, the only thing that makes a difference is removing the 8 pin connector.
  6. Hatton25 said:
    I've tried with the RAM in every slot and no difference, the only thing that makes a difference is removing the 8 pin connector.


    Sounds like a bad PSU, considering. It should be able to supply enough power, but it's failing too.
  7. I have a 500w psu which I could try. I've seen a lot of different solutions for this but I was wondering whether the fact it worked without the 8 pin in would specify the problem.
  8. Hatton25 said:
    I have a 500w psu which I could try. I've seen a lot of different solutions for this but I was wondering whether the fact it worked without the 8 pin in would specify the problem.


    Are you using the wrong 8 pins?

    It will work without, it's for supporting higher demanding PCIe cards. GPU's should connect directly to the PSU now.
  9. There's only one 8 pin on my psu? So if I was to leave it out it wouldn't make a difference?
  10. you cant leve the 8 pin off it provides extra current to the board.
    when you tried the memory did you try slots 1-3 or 0 and 2. put them in the wrong slots and you will get a cycling reboot.
    i know you said you tested the ram but thats not what i was getting at. use 2 working sticks and test both socket configs.
  11. I have only one stick of 8GB, which I tried in every slot. I only have the one unfortunately.
  12. Best answer
    that may be your problem than.
    like i said look in the manual, it may say that you need 2 sticks in 2 specific slots to get the board to boot.
    i just checked the manual and you do need 2 sticks to get the system to boot.
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