AMD FX 8350 Stability fail

Today I changes from FX 4100 (clocked to 4.3ghz) to FX 8350 4ghz at stock.. strange thing i discided to overclock it but i dont know why i tried to test it on stock 4ghz and stock voltages (1.39vcore) and it doesnt lasts more than 5 seconds and PC freezes.. (Testing with Prime95 windows 8)
What do you think could be the problem.. I dont think its voltage cauce i pushed it to 1.5vcore at 4.4ghz and again not even 5 seconds... After ever restart i have to unplug my power cable for 3-4 seconds or my monitor isnt showing anything..
MOBO: Asrock 880 U3S3
Pro: AMD FX 8350
8gh Adata 1333 RAM
GTX 770 Jetstream 4gb
620w Seasonic power supply
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  1. are you monitoring your temps any?
    That mobo probably doesn't have enough VRM strength to push 8350 very high..
    AND you have a small power supply and large video card + high tdp CPU..
    I'm voting for mobo as #1 problem..for now..


    yep..4+1 phase..no sinks on VRMs..it's the mobo.Hold your finger on the flat chips above those 5 cube boxes (chokes) while under load.
  2. Temp never go over 40c !
    28c at idle.. im with cooler master hyper 212 cooler so temps are fine.. i was thinking about the MOBO too... whst should i do?...
    Im not really into MOBO selection.. tell me what should i look for when buying one? specially for 8350 ? For a good overclock
  3. Radoslaw said:
    Temp never go over 40c !
    28c at idle.. im with cooler master hyper 212 cooler so temps are fine.. i was thinking about the MOBO too... whst should i do?...

    Get a beefier mobo..here's a guide (somewhat)
    http://www.overclock.net/t/946407/amd-motherboards-vrm-info-database/0_100
    hey! i know someone who has an m5a99x pro for $65 shipped..in US..
  4. schmuckley said:
    Radoslaw said:
    Temp never go over 40c !
    28c at idle.. im with cooler master hyper 212 cooler so temps are fine.. i was thinking about the MOBO too... whst should i do?...

    Get a beefier mobo..here's a guide (somewhat)
    http://www.overclock.net/t/946407/amd-motherboards-vrm-info-database/0_100
    hey! i know someone who has an m5a99x pro for $65 shipped..in US..

    recommend something... i have no idea how mobos affect overclocking
  5. I orderd Gygabite 990 FXA-UD3 lets see what we gonna do. I'll post the results after that
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