[WilliamCZ]

Hey there, I could use a hand with overclocking this CPU. Using Gigabyte Z170-HD3P motherboard and i3-6100.
I have followed all the steps from here http://overclocking.guide/gigabyte-z170-non-k-overclocking-guide/
When I save the values in BIOS, the PC resets to set the voltages and clocks. After the reset the monitor stays in sleep mode and after few seconds the PC reboots itself again and takes me back to BIOS saying my configuration failed to boot and resets the values back to stock. I haven't found anything regarding this anywhere, looks like everyone can OC without any problems at all, but not me. I've tried using F5g, F5 and F5i BIOSes, each ended with the same thing. Same thing happens even if I raise the BCLK just to 101. 105 BCLK with RAM set to 2800MHz boots. 110 BCLK with RAM set to about 2600MHz doesn't boot. 122 BCLK with RAM set to about 2600MHz doesn't boot.
Any help would be appreciated!

 

[WilliamCZ]

Anyone?

 

[compmaster]

I find it helpful to research all of the options which a guide asks to be configured, otherwise you could cause some serious damage!

Your motherboard is resetting to protect you, your overclock/voltage/other is too aggressive and absolutely will not boot as configured. The motherboard tests for htis and is resetting the OC values on the second reset to avoid requiring a bios clear.

The guide you are following is also misleading, stating that you "can" do this and "will be able to" do that. Hardware is not so cut and dried. Some CPU overclock well and, because of process flaws, others do not (some don't even work at all!).

I recommend starting off simple, only raise the core clock slightly, reset, and see if the system handles this. Take the overclocking process in pieces, read a few articles in this forum about overclocking, and only touch the voltage if absolutely necessary (stability issues at high frequencies but the system otherwise boots fine). As always, monitor your temperatures throughout the process and heavily stress your system after applying a new overclock to determine stability or you may be in for a nasty surprise down the line.

 

[WilliamCZ]

To be honest I doubt there is anything overagressive in this overclock. The CPU should be able to handle 4.5GHz on 1.325V with an aftermarket cooler just fine.

Also as I already wrote in my original post - it's not booting even when setting BCLK to 110 - which is a 370MHz overclock (tried stock voltage and even 1.325 voltage).

 

[compmaster]

Should be and can be are two separate entities. The fact remains, if the system were stable and bootable then the motherboard wouldn't be invoking the safety mechanism.
Just keep the ram stock while you are overclocking the CPU; Some memory is pickier than others about what frequencies it will run and can easily cause instability that will fail an overclock.

 

[WilliamCZ]

Well, I can't keep the RAM on stock when overclocking a non-K CPU, since it's a BCLK overclock. My retail RAM clock is 2666MHz (I can even run them at stock BCLK on 2800MHz with default CL just fine) and this happens even when I lower the frequency to around 2600MHz when raising the BCLK and changing the RAM ratio. There is a possibility this isn't related to RAM at all, but to what else then?

 

[rx7racer]

Not sure in your scenario but on my Giga Z170 ITX board after each failed oc attempt I have to actually reflash the bios, have no idea why but if I don't I actually lose some settings in bios as if it gets corrupted. Also keep in mind I believe all of Giga's bios updates are still beta.

Beyond that I don't have much else to help you with regarding oc'ing skylake on your particular mb.

 

[WilliamCZ]

Why do you have to reflash? You're not able to boot even on stock after one failed attempt or?

 

[rx7racer]

I can boot at stock but any type of oc even bumping bsclk to 105 will not boot. But after a flash I can OC as normal again until I hit a wall and caused it to not be able to boot. It was a long night of troubleshooting when I finally figured out if I reflashed I was good to go again.

Just a one off chance but when you mention even a very light oc not booting it made me at least want to mention it. It may not do a thing for you in your scenario, I don't know.

 

[compmaster]

Memory Speed = BCLK * Memory Multiplier
If you can, increase BCLK by some divisible value then decrease the memory multiplier to bring memory speed back to 2666.