Hello All,
I hope the Mods dont mind but I wanted to centralize this information under this one thread. This is mostly due to the fact that I am trying to find that happy spot of not setting my house on fire with this power hangry monster. The screen shots I have added will show the temps I have been getting and the scores on Cinebench R23. I encourage everyone to please help out by posting your runs and what you did to get the temps down. 
 
My Build 
CPU: core I9 13900K
MOBO: EVGA Z690 Kingpin Dark 
Ram: 64 Gigs of DDR 4 @4800 Mhgz
GPU: Geforce RTX 3060 OC edition with 12 gigs of DDR6 memory 
Case: Corsair 7000X
Cooling: AIO Corsair H170i with 3 120mm fans exhaust through the rad 
Fans: front 140mm x3 intaking
Fans: right 120mm x4 intaking
Fans: rear  120mm x1 exhaust   
 

 
 
 
 

I think that this should be pinned. So I'm pinning this.

 
Thanks RJ
 

It looks like you're over-volting and not "under volting". What score did you get? I'd guess around 38000, but I can't see your e-core clocks and I'm just taking a stab at how much it had to throttle when you threw 393W at it with an AIO.
 
I'm guessing you tried to adjust your V/F points, but I'm pretty sure there's a bug in the BIOS currently that prevents that from working correctly. Please share your settings and we can compare a bit.
 
Just to share some of my info, I haven't had time to tweak this more since doing some test runs a couple weeks ago, but it seems like if I put a -30mV offset on the 5400 and 5700 steps, leaving all others a 0, it will do the -30mV at my 5.5GHz all-core and limit the package to about 370W (this is with e-cores at 4.6GHz and atom core voltage at auto), giving me about 41k in Cinebench r23. If I just leave everything at auto, it'll hit that ~390W range and throttle in Cinebench pretty hard.
 
If I put a negative offset on the high end of my V/F points, the 5400 and 5700 get ignored and I'll crash because it'll apply the highest point setting to all points and I won't have enough voltage for when fewer cores hit 6GHz (my current OC). If I put negative offset for all-core frequencies and then a positive in the highest spot, it won't ever apply the negative offset for all-core. Honestly, I'm not even 100% sure that my current settings aren't applying a -30mV offset at all frequencies even though I have a 0 offset for the higher points. It seems to be better, but this BIOS doesn't even tell you what voltages started at for the frequencies, so you have to try and watch the all-core voltage and the max voltage and just do some guessing about what it did through lots of trial and error. The only setting that seems to actually work 100% correctly is the override, but then you have to try and find a happy medium voltage that doesn't cook during all-core, but is still stable with whatever peak clock you put in for fewer cores. I'd really like to get to a little bit lower all-core voltage if I can, so I definitely have some more testing to do. I was running r23 with about 360W and it was much cooler on the package, but the new BIOS updated the Intel microcode (which bumped up voltages a bunch) and I'm trying to see if I can just dial it in again without rolling back the microcode.

 
Hey Thanks  this is my my 2nd run with cinebench R23 with the Vcore off set of .025. For some unknow reason the normal voltage for the CPU is 1.8 ~ 2.0 according to the Bios on the Mobo but I have a friend of mine that is telling me that is freaking nuts that it should not be running that his of a voltage 
 


 

Yeah, 1.8-2.0 would be nuts. Also, that is indeed adding 25mV to stock, not undervolting. You'd have to put a negative voltage in there to undervolt it. Just changing the setting there will do a global undervolt (at all frequencies). It won't lock the voltage (like the override setting does), but it will apply a +25mV offset to the whole V/F curve.

 
Ok guys I did some more tweaking and found out what I was doing wrong. First you all can call me a freaking Idiot, because I did not scroll up to get to the negative side of the Vcore offset. With that being said here is my last run.  Negative Vcore offset of .225 Nothing else has been touch. I am still running hot on half of my P-cores but the temps are not staying at 100C they are just bumping it for like a split second. I think my next stop will be -.300 and see what that gets me. I will run that tomorrow and post the results. 
 

 
  
 

I think -.23 is too much and it's possible that it is ignoring the setting and just running stock voltage. If you're running stock clocks, you may have better luck with the override voltage and then working your way down on the voltage setting.

I just set an Adaptive -50mv offset, and 6400hz XMP on my DDR5. Everything else on AUTO.
My temps do not go over 91c with full load on the 13900K.  I am also using the 420 Arctic Freezer II AIO, in a Fractal Torrent case.
Everything runs great!, did a OCCT CPU test and OCCT MEM test, no throttling, or errors.

hello my 14900kf is overvolting