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Unstable new build? Reboots as soon as I run Prime95.

Hey guys,

Im a NEW pc builder. I just built my first pc:

I7 4790k
Supernova B2 750w 80 plus bronze
Corsair H105
Patriot Viper 8gb ddr 3 (2x 4gb) 1866MHZ
Gigabyte GA-Z97X-UD5H-BK
Samsung 840 evo 120gb ssd (Boot drive)
WD Black 1tb hd
Blue ray burner


I have had some issues with my computer being stable. In the beginning I could turn the PC on and use it for 25 min then it would just power off and get stuck into a boot cycle. I thought it was the temperature so I replaced the stock cooler with the H105 and it solved the problem for a short time. Now I am trying to run Prime95 and as soon as I push "run" it immediately restarts my computer and boots back up normally. I haven't been doing any special or intense tasks besides surfing the web.

Suggestions? I have not tried running Memtest yet, its on my to-do list. All of my components are at stock settings.

Thank!!
10 answers Last reply Best Answer
More about unstable build reboots run prime95
  1. Have you updated the bios?
  2. bignastyid said:
    Have you updated the bios?


    I have updated the BIOS. Could it be my Vcore? If so, how would I change it?

    Thanks
  3. zdoublea3303 said:
    bignastyid said:
    Have you updated the bios?


    I have updated the BIOS. Could it be my Vcore? If so, how would I change it?

    Thanks


    If you are running at stock setting the vcore should be fine. Did you run memtest?
  4. bignastyid said:
    zdoublea3303 said:
    bignastyid said:
    Have you updated the bios?


    I have updated the BIOS. Could it be my Vcore? If so, how would I change it?

    Thanks


    If you are running at stock setting the vcore should be fine. Did you run memtest?



    I just updated the BIOS and ran memtest and I am still having the same issues. Could it be a faulty CPU?
  5. As already asked, are you running the CPU at stock speeds and Vcore?
  6. Colin Lee said:
    As already asked, are you running the CPU at stock speeds and Vcore?


    Yes, everything is running at stock. Do you know what the stock Vcore should be at?
  7. zdoublea3303 said:
    Colin Lee said:
    As already asked, are you running the CPU at stock speeds and Vcore?


    Yes, everything is running at stock. Do you know what the stock Vcore should be at?


    Leave it on auto for now until you've figured out your problem.
  8. You may want to pull the cpu and check for bent or broken pins.
  9. bignastyid said:
    You may want to pull the cpu and check for bent or broken pins.


    It's an i7 4790k, it doesn't have pins.
  10. Best answer
    The pins are on the motherboard and you have to pull the cpu to look at them.
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