I5-2500k wont OC over 4.2ghz

I recently got new cooler Scythe Mugen 3 PCGH.
I went to OC my cpu and max i can oc is 4.2ghz (with everything else on auto)
I tried to get pass 4.2ghz but even if i put 4.3, increase voltage (got to 1.4v) but i get boot loops.
My pc starts booting and it freezes couple of seconds after restart, restarts couple of times and then reverts bios settings.
I tried various things, changing voltage, disabling/enabling things, nothing seems to work.


MY specs:

CPU: i5-2500k currently @4.2ghz + Mugen 3 PCGH
RAM: Corsair Vengance 8gb 1600mhz (currently 1333mhz in bios since cpu doesnt support more than that)
MBo: Gigabyte Z68X-UD3P-B3 (bios version f4)
PSU: Corsair HX-650w
GPU: MSi GTX580 Lightning @stock clocks
+Soundcard: Creative Fatality X-FI
+1SSD +3HDD
5 answers Last reply
More about 2500k wont 2ghz
  1. The question is how did you achieve this? Did you leave BCLK at 100? And just change the multiplier? Or did you change the BCLK and the multiplier? For OCs you should leave the BCLK at 100 and adjust the other settings.

    It's also quite possible you hit the wall and can't OC further. My 2500k chip was only capable of 4.3GHz. Nothing greater than that.
  2. Also noticed your BIOS is dated. I suggest you update it.

    DDR3-1600 RAM is supported by the board. The 2500k also supports DDR3-1600. So your settings or possibly BIOS needs some tuning regarding RAM.
  3. I changed the multiplier. I updated my bios to f8, put ram on 1600 mhz and still same results. Could it be that my ram should be in dual link since because of cooler i have them in 3rd and 4th slot
  4. sukyman said:
    I changed the multiplier. I updated my bios to f8, put ram on 1600 mhz and still same results. Could it be that my ram should be in dual link since because of cooler i have them in 3rd and 4th slot


    Your ram shoud bein 2+4 or 1+3. But I doubt thats your issue. You may just have a dud chip, it happens. 1.4v for 4.3GHZ is abt high. You should be able to get closer to 4.8-5.0 with thoes voltage. Atleast i could with my old 2500k.
  5. mancsoulja said:
    Your ram shoud bein 2+4 or 1+3. But I doubt thats your issue. You may just have a dud chip, it happens. 1.4v for 4.3GHZ is abt high. You should be able to get closer to 4.8-5.0 with thoes voltage. Atleast i could with my old 2500k.


    Yeah, its a dud chip. I have like 1.3V @ 4.2ghz and most of people get that kind of voltage at 4.5ghz
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