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8600k at 5GHz in Asrock Z370 Extreme4. Power throttling??

Take the dGPU out.
Turn off the PSU.
Connect to the motherboard HDMI/Displayport.

Set the BIOS clear jumper as per the manual and leave for 60 mins.

Remove the BIOS clear jumper, try again.

There is no real reason why settings to defaults would cause it not to work unless by coincidence somethings failed.

However in the process of fault finding you may have now introduced one…

Secondly, higher reported voltages when under moderate load compared to high load is expected and not necessary a bad thing.

For the record I was running a 9900K on a Z370 Extreme4 and drawing 200W+ for hours on end, so the PWM is more than capable.
 
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FreeStream said:
However in the process of fault finding you may have now introduced one…
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How? The only reason I can see for this to happen is by removing gpu/ram sticks and inflict some kind of physical damage to the sockets/pins.

FreeStream said:
Secondly, higher reported voltages when under moderate load compared to high load is expected and not necessary a bad thing.
Click to expand...
I know, that's why I'm still completely puzzled with what has happened. My oc settings were perfectly safe (far away from something remotely aggressive).
FreeStream said:
There is no real reason why settings to defaults would cause it not to work unless by coincidence somethings failed.
Click to expand...
I'm starting the believe that's the case... Weird? yes. Impossible? nope... The thing is, it seems the pc goes into some kind of locked state where I can't output any screen, use the keyboard (I think ctrl+alt+del should at least work by rebooting the pc) or pass that infinite looping state.
FreeStream said:
Set the BIOS clear jumper as per the manual and leave for 60 mins.

Remove the BIOS clear jumper, try again.
Click to expand...
This hasn't worked either. I'm running our of options. I think the best thing to do right now is to brig the pc to a hardware workshop and check if either mobo or cpu (both would be a 1 in a million scenario) or maybe even ram are dead. If is the mobo the one to blame though, I'll never buy an asrock product again.
Thanks for all the advices and time trying to help.
 
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tamzzy said:
Yeah the only thing I can think of is that the eeprom failed to write properly when you reset to default
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I've found a place where they can desolder the bios chip and try to reprogram it. Would that be a waste of time? Even if it isn't... they offer no warranty on the process and it costs from 25 to 50 bucks... I don't know. If the mobo is the one component that has failed (I believe there is a 99% chance that this is what's going on) and if the cpu is fine, I think I will downclock the 8600k sell it for cheap (warning the buyer that it has been mildly oc'ed for some time) and getting a new ddr4 mobo+cpu (maybe a 5800x3d with a decent b550 or x570) and reusing the rest of my components. This setup is 5 y/o now, so maybe is time to (forcedly) move forward.
I'll post the results from the workshop's diagnostic once I have some news though.

Thank you all for your help!
 
tamzzy said:
yes

i think the best bet would be to try your components on another mobo and see if the issue persists
probably worth bringing it to a computer repair shop where they may have a spare mobo to do the above
Click to expand...
So if the mobo is the failing component, it's not worth trying to reprogram it. That was my guess as well, yeah.
I already have an appointment on Monday and they will check the pc during the same morning. For 20 bucks they'll test mobo with another intel 8th gen and the cpu with a z370 chipset. Honestly? I hope is the cpu the one that is broken as getting a second hand 8/9th gen cpu is cheaper and safer than buying an used/refurbished mobo. I won't be so lucky...
Cheers
 
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UPDATE: the problem has been solved. It seems the bios got corrupted when loading UEFI default values. It shouldn't have happened, but it did. I brought the pc to the shop and after desoldering & flashing the bios, everything got fixed. 40 bucks for the whole reparation. Could have been worse. At least now I have the latest available bios version...

I wonder why the second bios didn't kick in though...

Anyway, after this episode, this is the last ASSrock product that I'm gonna own.

Thanks for the help!
 
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