Offsets and curves... Do yourself a favor and lock it to whatever frequency and voltage you need for that frequency, zero headaches especially for a stock guy. Might wanna consider unclenching those ass cheeks and getting yourself a real cooling solution first though. You are running a chip that can bring a custom water loop to its knees.

 

I remember hearing an asus representative claim that a dynamic overclock would be better and he painted people like you as backwards or whatever but in reality static overclocks are preferable if you have good enough cooling for them.

It's a lot of work to check a dynamic overclock for stability.

But i don't plan to spend any more money on a cooler for a CPU that is partly faulty.

I ended up having to downclock core2 to 5Ghz which works for now.

 

v/f curve tends to use way more voltage than what is actually needed, you might want to set a static voltage and use a llc to stabilize your CPU OC.

 

v/f curve tends to use way more voltage than what is actually needed

From my experience (with 3090 and 13900KF) the margins are significantly larger at lower frequencies.

I was afraid of my bad core preventing me from doing too much undervolting at lower frequencies but that seems to be very much not the case.

Voltage dropped to 0.94v during cinebench (105W) according to hwinfo. I remember the cooler managing 180W when i first installed it so it has gotten worse over time. I should repaste it, i can still power limit my CPU if i want low power consumption after that.

I tried setting a -0.220 offset at 3400 to 4300 but for some reason i couldn't get any error in any stresstest, maybe i should use "adaptive + VF offset" instead?

 

Using it with msi pro z790-p.

It's just core 2 it seems (starting from 0) so looks like i am fine for now but it's a bit worrying.

Never pushed the CPU particularly much since my aircooler (AS500 plus) cannot handle much wattage anyway, i think i need to replace the cooling paste.

The IMC still works fine too (no sign of instability at 6600 with good timings with 2x32 GiB ddr5).

Took me a while to find the problem since i at first assumed the CPU would be stable with default bios settings but no it actually wasn't.

The core went bad when when i used an VF curve offset of at most + 0.04 with a max core frequency of 5600. I used a positive voltage offset in an attempt to stabilize the system with BLCK of 1.012 which still didn't fully work.

At most 3 cores are currently stable at 5600 with the default voltage.

The stock frequency for a 13900K is 5.4 ghz, NOT 5.5 ghz. (just like a stock frequency for a 14900K is 5.6 ghz, NOT 5.7 ghz).
However a 13900K should have no problem running at 5.5 ghz. Just keep in mind 5.5 ghz is an overclock already.

Try setting sync all cores: P=55, E=43, R=45.
Set Loadline calibration to level 3 (Mode 3).
Set vcore to "fixed" mode (i'm not sure what setting is "fixed" on a MSI board). There are two settings, one is "Fixed" vcore and one is "override" vcore. I do not know what is which, you need to read the MSI board settings. One of the two changes the CPU VID to a new value (this is what Gigabyte's "override" mode does---while on Z390 and older, "override" mode changed actual vcore instead of VID, and now on Z490 and newer, their "Fixed" vcore changes VRM Vcore). You want to find the voltage mode that changes the VRM vcore, not the CPU VID.

Once you figure that out, set your vcore to 1.30v, with Mode 3 LLC. Then first, try to run cinebench R15 ten times in a row without stopping, and have HWinfo64 open to see if you get any WHEA errors in the sensors window at the bottom. If that passes, try to run "R15 Extreme mod" (this is a much longer run of R15), if you can pass that 5 times, then try to run Y-cruncher SFT test and see if it passes. If SFT passes, your CPU is stable at that bios set voltage (I am not sure what the load voltage will be, and I don't know how MSI's die sense and socket sense work).

Once you finish that, then you can start messing around with 5.6 ghz.

 

Be under warranty… could try a rma for
It.

I actually googled it and it said 3 year warranty from intel, definitely an option to consider if it gets worse.

The stock frequency for a 13900K is 5.4 ghz, NOT 5.5 ghz. (just like a stock frequency for a 14900K is 5.6 ghz, NOT 5.7 ghz).

However a 13900K should have no problem running at 5.5 ghz. Just keep in mind 5.5 ghz is an overclock already.

It was unstable even at 5200 Mhz, definitely something wrong with that core.

The other p-cores are fine up to around 5500 it seems but only got 3 to 5600 with the default vf-curve.

Note that by "default" i refer to what msi sets it to after a bios reset.

Not worth increasing the voltage on 7 healthy cores in attempt to get the bad core stable at higher frequencies, especially not if i don't even have cooling for it.