4.2 GHz+ and weird shutdown issue

[Dave3000]

I own an i7-4930k and an Asus P9X79 Pro and I have a weird issue when I set my OC to 4.2 GHz or higher after saving the settings in the BIOS. The weird issue is that after saving the BIOS settings and exiting the BIOS, instead of restarting right away, my system will shutdown for 3 seconds and power back up. This shutdown issue does not happen at less than 4.2 GHz. Also when I go back to stock settings from 4.2 GHz+ I get the same shutdown issue for 3 seconds. It does not seem to matter what the CPU voltage is set to because even setting it to 1.25v on the vcore, it still has that same issue with shutdown after exiting and saving BIOS settings at 4.2 GHz+. Is this a known issue with the 4930k on this motherboard once it hits 4.2 GHz or is it an unstable OC that is causing it?

 

[VirtualLarry]

Intel chipsets have always double-booted to change chipset straps, for some reason. Back to the 965 / P35 days, or perhaps earlier. There may be a chipset strap change around 4.2Ghz.

If it double-booted multiple times in a row, or did it, and then posted with an "overclocking fail" message, or a Mhz rating that was stock, then I would say it was because of a failed OC.

 

[Puffnstuff]

On my z97 chipset when I make a bios change it will often times, depending on what I've changed, do the very same thing and is normal.

 

[LTC8K6]

Same here with an ASUS Z97-A

 

[Burpo]

Intel chipsets have always double-booted to change chipset straps, for some reason. Back to the 965 / P35 days, or perhaps earlier. There may be a chipset strap change around 4.2Ghz.

If it double-booted multiple times in a row, or did it, and then posted with an "overclocking fail" message, or a Mhz rating that was stock, then I would say it was because of a failed OC.

This ^^^^^^^

 

[crashtech]

It might be a problem if it continues to do it even when no settings are changed, but most boards I have owned need to "cold boot" themselves when certain things are changed. My current Z97 board will also cold boot itself when memory timings are changed.

 

[Schmide]

I had this same problem. I had to increase the voltage to the ring bus or uncore area by like 10%.

 

[Dave3000]

When I used to own a Gigabyte P45 motherboard with a Q9450, and an Intel P45 motherboard with a E6700 it would do the same thing after changing certain CPU settings in the BIOS like hyperthreading or cores used.