Getting BSOD on i5 2500K doing Simple Overclock (Need advice)

Hello, New to the forums here, (Even though I have been sneaking around in these forums a while before posting)

I have been trying to overclock my i5 2500k off and on for a while now. I haven't tried much until lately but I have been running into BSOD's a lot whenever I raise the multiplier even just a little bit and try to follow guides with my voltages and settings in BIOS to make sure it is correct etc. I can get the 2500k to run at minimum load at 4.0Ghz but once I start running Prime 95 about 5-10 minutes in I get a crash. (however temperatures are only going to about 58 degrees so I don't think temp is an issue.)

Below are the specs of my machine. Please let me know if anyone has any ideas as I would like to keep this 2500k for a while instead of paying a lot for an upgrade to speed.

Is it possibly my PSU is not powerful enough? Or is my RAM not snazy enough? Or should I look closer at voltages? (I make sure to not set them to "Auto" I have been setting them to the default voltages manually to make sure the board is not freaking out.) I am just looking for a simple boost to about 4.0 to 4.2 Ghz OC.

I'm listing the below if there are suggestions that maybe one of the peripherals is causing issues or maybe my PSU is not powerful enough for everything I have going on inside?

PSU: Antec 620W Green (80+ bronze)
Motherboard: ASUS P8Z77-V LK
RAM: 8GB (2 x4GB Corsair vengaence at 1333mhz)
CPU Cooler: Zalman 92mm fan
CPU: i5 2500k
PCIE: Intel 802.11AC wifi Card
SSD: Crucial M4 60GB
HDD: 2 different 500GB drives.
External Hard drive plugged in

5 answers Last reply Best Answer
More about bsod 2500k simple overclock advice
  1. Refer to this guide for overlocking your PC and check if you missed any of the listed important steps:
  2. What voltage are you running that thing on with your current clock and what voltage are you trying to use with 4.0ghz?
  3. Ellis_D said:
    What voltage are you running that thing on with your current clock and what voltage are you trying to use with 4.0ghz?

    I am not at home to check on this but I am going to guess 1.3 volts if I remember correctly
  4. Best answer

    you shouldn't need to do anything except change the cpu multiplier/ratio from 33x to 40x, 41x, etc. the svid will automatically adjust vcore voltage for you per the factory voltage curve specs that were determined when the chip was made. most 2500ks should run fine without any other adjustments at 43x.
  5. Mine 2500k is at 4.7Ghz - 1.39v for almost two years. You should check out this thread :
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