4790k processor instability. Please help

Hey Guys I have a 4790k processor and it was running a little hot, so I decided to undervolt it.

I was able to get it down to a -90 mv core voltage offset undervolt and it passed xtu's stress test for 8 hrs. I changed the udervolt to - 80mv though because I was worried it wouldn't be stable enough and because I didn't stress test it for a full 24 hrs. After a few days it crashed, no blue screen just instashut off, so I undervolted it to -70mv instead and then after a day it crashed, so I undervolted to -60mv and underclocked 4 core max speed to 4.0 ghz instead of 4.2. after a day it crashed again. I don't know whats wrong. Why is it shutting down? Is my cpu really unstable at such a small undervolt. I did notice that the past couple times my laptop shut down it was while it was accessing the d drive. keep in mind some of the crashes happen while the cpu isn't even under load.

rig:
cpu: 4790k
gpu: 980m
ram: 16gb 1600mhz
storage: c: 500gb samsung 850 evo and d: 1tb 7200 hard drive
laptop model p750zm

 

The load voltages are not difficult to undervolt. It is the idle voltages that usually give issues.

Nothing to fix here. Just don't undervolt that cpu.

 

What if I upped the clock speeds a little then. That way the voltage doesn't idle so low? Would that work?

 

Afaik, that is not how it works. Idle speeds are either enabled or not (usually in the BIOS) and users have little else control of them.

I would ask in the ThrottleStop thread instead. The resident experts there along with the TS author, unclewebb, will help much more than I can with this.

See:
http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/


Good luck.

 

Set your power management to maximum performance so the clocks don't dip anymore and then try undervolting. Alternatively you can just turn down the TDP in XTU while running the stress test until the core drops to the temperature and clock that you want.

Repasting your CPU couldn't hurt for temps.