Question SkylakeX 1 Core Won't Overclock

[Maxxvertigo]

I have an Asrock X299 Extreme4 + SkylakeX 10-core i9-9820x.

Setting the ALL CORE multi settings in bios changes all cores but one, which sticks at 4.2 as long as hyperthreading is enabled. If disable HT, all cores hit the set speed.

I've tried:

1. bios update even though it's not on the known issues
2. full cmos reset
3. setting the per core / all core / specific per core options
4. I've enabled all power options to auto as well as removed all power restrictions for the cpu, both same result on the one core.
5. Tested with MSI afterburner, HWInfo, Steam In-Game overlay and CPU-Z

I can run a full Time Spy Extreme CPU test @ 4.6ghz @ 1.265v with HT off and it's rock solid so I don't think it's a problem with the core. I also game at 4.6 with HT off and the unCore at 3.1ghz as it's usually much quicker.

I'm totally accepting this is a possible sensor bug and the core is actually running at it's stated speed...however I don't have a similar system to compare to at higher than base clocks..I could try another app but if HWInfo, CPU'z, Aida, and MSI all report it then I don't know what else to try.

 

[Maxxvertigo]

Also tried it at lower multipliers and it's still stuck at 42 multi as long as HT is enabled.
It's reporting the multiplier as 42 in the CBO/Core section so it's not a sensor problem or software.
I've searched a good bit on google but can't find anything close. It's a hard search to do because of all of the related stuff.

 

[thestryker]

Do you have XTU installed at all?

I had weird issues on my BDW-E systems where at some point the BIOS OC settings just weren't working right and I'd had XTU installed the whole time, but didn't use it for the settings. I ended up having to apply OC settings through XTU to get it to work properly though I didn't ever reinstall Windows without it to really get into trying to fix the issue.

If you don't have XTU installed you could always give that a shot assuming Intel hasn't taken down the legacy version.

 

[Maxxvertigo]

hey thanks for the reply. I ended up getting XTU installed and working somehow. It reports the core as 42, let's me change it in windows successfully however at reboot the core goes right back to 42 while the other 9 are at whatever multiplier I set.

I tried manually setting the specific per core setting to match the CPU specs but no dice.

Maybe if I can get this watchdog driver thing working, I'd be OK just having XTU apply at startup but I'm really curious as to what is causing this.

 

[thestryker]

The only other thing I can think of trying would be trying a portable OS or just another install just to see if the issue still happens. It's likely either going to be an OS level issue or a BIOS bug and realistically you can only fix the former. In my case I'm fairly certain it was OS level because I never reinstalled Windows. With your issue only. affecting one core I'm not as confident it's OS.

 

[Maxxvertigo]

thanks again for the advice.

Yeah I've ruled out the OS doing anything. I think this is just a bios bug with it's AsRock CBO nonsense (even though I've disabled CBO on all cores and it's the same result.

no matter what I do or change and I'm confident I've changed it all in the bios at this point..lol..it will always boot the one core at 42 multi if hyper-threading is enabled and I select anything other than Auto for the cpu multi.

I overclocked my first system changing only 4 values. FSB, cpu, voltage and memory ratio.

Not that I mind the complexity and customization of current gen cpu's, but damn...AsRock motherboard's description of things ...be like...

Active CBO Cores: shows active CBO cores.

The people at AsRock, MSI, ASUS, etc who write these manuals have to be the biggest morons on the planet.