13900k undervolting weird result

[PcErrorx01]

13900k undervolting strange result

Hi, I've spent the last few days undervolting my 13900k and I'm at a point where I'm wondering if this is normal as I don't know enough about it. I have read everywhere that if you want to undervolt using negative adaptive offset, you should try conservative settings such as -0.05v or similar. I started with that and everything was stable, then I tried higher values. I am now at -0.15v and everything is still stable? I have limited the 13900k to 200w and reach + undervolting in cinebench and OCCT 5.2ghz clock rates. Why does the CPU still run stable, I read everywhere that even with -0.1v not all CPUs can cope.

Actually I assumed a temperature loss, but apparently this “loss” is compensated with a higher clock rate, which is okay for me, because the temperatures at around 80 degrees are completely fine.

Can someone explain to me why I can undervolt so much?

My specs:

Asus ROG Strix Z790-E Gaming Wifi
Intel i9 13900k
2x 32GB G.Skill DDR5 RAM
Nvidia GeForce RTX Palit 4090

[Vynra]

you probably arent stable in single core loads with that mnuch of a undervolt. try cinebench23 single core test.

[PcErrorx01]

Thank you i will try that right now. Is it normal that the clocks go higher instead of Temperature lost?

[Vynra]

undervolting = less power so the cpus see higher boosting potential so they clock higher. your essentially shifting the VF curve. whether how low you can go and be stable is up to the cpu. but because you have a 13900k im assuming to get that 5.8ghz you probably need to be around 1.34ish to be fully stable. which is why i dont think you will be stable with that low of a undervolt. in multicore workloads you might be stable. should definitely run 30 minute run of cinebench single core and OCCT tests to make sure there is no instability

[achugh]

Hi @PcErrorx01 under Tweaker's Paradise do you have Undervolt Protection set to ENABLED. My understanding is that when you enable this protection; specially when you are using the Intel Performance or Extreme Profiles which you should be using for stability these days with the latest BIOS using microcode 129; instead of CPU crashing you will begin to see lower clock speeds. I am not sure how this is connected to CEP settings which is another factor in preventing the CPUs from crashing when undervolting.