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Just some questions and suggestions for my golden z790 Apex Encore and base lottery 13900k with DDR5

Level 9

I got an z790 Apex Encore found out it was a perfect off the assembly line production. With my 13900k with an SP's of P:115 E:91 IMC:83 like I said base lottery, the T-Force XTREEM ARGB 8000mhz cl38 2x24 ram will pass posting no issues, will get me into windows flawlessly, let me browse the web to other simple task, but gaming/3dmark/Karhu yeah.... 

So for the simple fast I can get it 100% stable at 7200mhz cl34, and the fact in just xmp I and II it will post, boot into windows and do the other things I mentioned both in let the bios decide and do not exceed limits, the board is up for it. The issue is I know nothing about tweaking DDR5 to do that I know it needs the right voltages in places but honestly no clue where to start. The last really nice board I owned was an EVGA X58 Classified Limited Edition when those came out over a decade ago. 

Any tricks, tips, advice, what exact settings to tweak/where to start to get my 8000mhz kit to 7800mhz cl36 or at its rated 8000mhz cl38 stable would greatly be appreciated.


Super Moderator

Hi @donta1979 

Feel free to try either of these profiles (see attached). However, your mileage may vary depending on the CPU sample (profiles made on 14900K)

One is tuned for 8200 C36, and the other is 8600MT C38. Try the 8200 profile and reduce DRAM Frequency to 8000MT.

You can also try clearing the CMOS and simply setting XMP II, as this contains the default DIMM profile which often has slightly relaxed subtimings.

Also have a read here.


13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Sadly that's for g.skill kits for whatever reason the Teamgroup T-Force kit functions a little differently on timings, so far I got 7200mhz cl34 stable, and 7600mhz cl36 stable. These XTREEM kits do not like those G.Skill settings for whatever reason.

Same IC, so should do some variation assuming the CPU can. GSKILL hand binning is always favourable, though.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Level 9

Yeah I just want to get anywhere from 7800-8000mhz cl34-36 stable and honestly would be happy. Even If I could get my 8000mhz cl38 stable on kits xmp.

Did you try XMP II, you didn’t say?

Also try Maximus Tweak Mode 2. Not all CPUs will be able to do 8K easily.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Yes I have tried XMP I and II, XMP Manual... Tried Maximus mode 1 and 2.
After trying a lot of stuff, my 7600mhz stable is well no longer stable, So I reset my bios again like I do every time when I play around playing with stability. Didn't enable xmp and manually put settings in actually made it to 40min on karhu then it threw an error.... Getting a little well defeated atm, was hoping this board things would you know just work. 

Check the MC SP Score by running the test located under AI Features. You may do well to try returning the memory kit and purchasing GSKILL, but there are no assurances when it comes to overclocking.

Have a look here for key voltages you may wish to address.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Already did its 83, I have noticed even with it being a good IMC SP score it does not really like going above 1.375-1.385v on the IMC. Yeah I have noticed that people with G.Skill kits just have better luck on the Apex Encore. Since ASUS really has zero support for XTREEM TeamGroup kits on the Apex Encore. Like the one kit they do list a 7600 or 8000mhz 2x24 kit does not even exist and turns up nothing on the net.

sigh cannot delete... tired been at this for days....