R4G strange overclocking Failed F1

[alexnode]

Hi all,

Once every few days I get a boot message "overclocking failed press F1" - I go to the bios press f10 saving the settings as they were and boot normally, no problem at all. I don't change a thing. Then i work all day no problem at all and then after a couple of days I have the error again.

I have a small portable 3D workstation with -
rampage iv gene with 3930k, 32gb ram crucial 1600 mhz 1.5v -two gtx 680 no SLI , a few SSDs etc. H100i corsair
My machine is offset overclock x42 and goes from 0.85v to 1.36v (can't lower it more becasue of vdroop ) temp 33 c on idle 65 full load - passed 5 hours P95 a couple of times.

Anyhow the machine is quite stable I had a crash per week of rendering 24/7. I have the impression that it is vdroop related after the workload finished, it crashed on idle (And in the middle of the night so not sure what was going on that time) . But no other problems so far. ( I have this build for a couple of months). The vdroop crash is very difficult to detect and it happens only when I render for 20+ hours and then goes to idle. It is OK if I go for a lunch break and close all the programs for 30 minutes.

Any suggestions ? I want to have the machine at 42 multiplier and with offset because I have quite a lot of similar rendering workstations and don't like consuming loads of power for environmental reasons. Do you think that this is related to vdroop I am quite happy with the voltage settings and temps so far so I was wandering if i should just let it be ... but on the other hand you want your machines to be perfect ! And it doesn't look good having to go to the bios to start the machine ...

Thanks in advance.