LM between IHS and cooler. (hey BTW, someone mentioned, the best way to clean a first LM application is to add a bit more LM, it will dissolve the alloy, then you can clean and reapply)
Hot winter day, 27c room temp.
At stock, the CPU reaches 85c in CB20
OC attempt 1:
4300 all cores at 1.325V reaches 76c,
OC attempt 2 (per CCX OC):
All done within ryzen master. I would not recommend using the WorkTool (explained further below)
4500 on CCX0
4400 on CCX1
4350 on CCX2-3
Vcore at 1.35V (vdroops to 1.26V at full load) Max temp on CB20 is 83c
Both with my h115i Pro AIO (4 fans push pull) at rather quiet fan curves and balanced pump. I call that a win.
My CB20 MT score is 7650 and my ST score in CPUz is 550 At stock my 3900X never went over 43Ghz. Stock MT score was "mere" 7050
RAM is 64gb 4dimm dual rank Hynix A die Vengeance running at XMP 3000Mhz. (I plan to go 3200Mhz as I did until I switched CPU)
Interestingly enough I also tried a per CCX OC at 1.35V as der8bauer did. The CPU temp shoot up all the way to 92c on the first two seconds of CB20 MT. I immediately stopped the test, no crash however, but I didn't let it go more than that.
So it seems the heat density is indeed a thing and no matter if you move the heat faster with LM it will still go as high as 92c after a relatively small vcore increase.
So past 4.3Ghz the vcore requirement doesn't seem as high for 1.35v compared to 1.32v but the temperature curve between them is incredibly steep.
I found out the CCX "WorkTool" bumps the vcore back to 1.48V after you apply a clock change BE CAREFUL! that's what sent my CPU to 92c
If I do the whole thing in Ryzen Master the vcore stays at the desired 1.35V and the temp stays at 83c
Let me know if anyone of you guys are trying with LM and an AIO. I wanna compare.
Here's my build. Notice what I did with the Wraith Prism fan enclosure.