Asus Z790 Apex XMP issues

[kvarq]

Asus Z790 Apex
13900KF SP 103 (P113/E83/MC73)

G.Skill 2x16GB 6400MHz C32 F5-6400J3239G16GX2-TZ5K (M die)

It seems that the Z690 XMP issues are still persisting this round as well...
XMP I or II activated seem to not be ok for games (these are crashing for some reason), ALTHOUGH GSAT passed overnight for long hours or TM5 with anta's profiles passed as well
Did not touch the IA/SA voltages, just XMP is enabled...

[kvarq]

today the mobo did not start, stuck at 69 code
that’s probably related to the memory controller or something
I’ll flash the bios again and see how it goes

*that’s so annoying*

[kvarq]

today the mobo did not start, stuck at 69 code
that’s probably related to the memory controller or something
I’ll flash the bios again and see how it goes

I'll also manual set mode 1 or mode 2, saw that now there are not anymore the write/copy differences as were for DDR4



noticed now that with 0812 my MC SP "jumped" to 76 :))


Default, the MRC fast boot is "enabled" by default and the full check is on auto...
The MC voltage is between 1.137C-1.154V, it's fluctuating.
Shall these settings be kept default or changed for a better XMP daily stability?

[kvarq]

I'm still nowhere getting stability with this board.
And I am pretty tired to find reasonable and stable manual settings.

So, leaving the stuff on auto with just the XMP enabled seems a no go for this generation too.

I tried also 2x16GB 6400MHz kits with M-die and A-die, so it's not the die.
The A-die silver stuff is not helping either.




The only thing that definitely helped so far was to enable XMP I instead XMP II which allowed me to play 5hours+ w/o any interruption...
"XMP tweaked" is not available on my end.

I also did manual set on tweak mode 1 and also mode 2, saw that now there are not anymore write/copy differences as were for DDR4.


I also tuned the following voltages between 1.40 and 1.45V, this did not help.
Dram VDD voltage
Dram VDDQ voltage


There are probably some other things to tweak - although these SHOULD WORK and be stable with the default values once the XMP is activated...
CPU System Agent voltage
IVR Transmitter VDDQ voltage
Memory Controller voltage

The MC voltage is between 1.137C-1.154V, it's fluctuating. Saw other people have it like 1.33V on their screens having the same 6400MHz kit.

In the memory settings, the MRC fast boot seems to be "enabled" by default and the full check is on auto...
Probably these need to be changed too?

For the Z690 the most general "solution" was to set the RAM manually with the values from XMP to be stable in games.
The XMP daily stability is still a hit & miss nowadays unfortunately. And this is annoying, why to pay 900 Eur for a "premium" board if not even 6400 XMP does NOT work?
Auto & XMP are A NO-GO for this motherboard, maybe the board is faulty, I cannot return it because it is bought from abroad, warranty is not valid since Asus warranty is LOCAL, not even within EU.
That's how you flush down to the toilet 900 Eur, I'm so annoyed.

[Silent_Scone]

1.15v for MCVID is quite low for the frequency. You may want to try raising this.

MRC Fastboot can be left enabled if by default.

Overclocking is never guaranteed, this sticky explains XMP https://rog.asus.com/forum/showthread.php?98041-Understanding-and-using-XMP

[akgis_]

Hello mate I have a z790 apex and I know how DDR5 OC can be treaky.

Iam now running a 7800kit at 8000 still tweaking it, but I had that kit before on a z690 hero @6600mhz stable, and on the Z790 should be even more stable.

Iam pretty sure your MC voltages are low if you see 1.1, I had that kit on the z690 at 1.4.

Would help if you could use HWinfo run the sensors and post a screenshot of the section Asus Maximus Z790 something like this

https://i.imgur.com/jZ3AGrE.png

the IMC VDD should be 1.4

[Silent_Scone]

akgis_ wrote:
Hello mate I have a z790 apex and I know how DDR5 OC can be treaky.

Iam now running a 7800kit at 8000 still tweaking it, but I had that kit before on a z690 hero @6600mhz stable, and on the Z790 should be even more stable.

Iam pretty sure your MC voltages are low if you see 1.1, I had that kit on the z690 at 1.4.

Would help if you could use HWinfo run the sensors and post a screenshot of the section Asus Maximus Z790 something like this

https://i.imgur.com/jZ3AGrE.png

the IMC VDD should be 1.4

The "IMC VDD" is CPU dependent and frequency needs to be taken into account, some CPUs may not want or need this much. So it "should be" whatever works in that individual's case. I'd recommend starting from around 1.2v and working up incrementally in 20mv to 30mv steps.

My 13900KS likes around 1.365v for 8200MT, for instance.

[kvarq]

Much obliged.
Already tried 1.30V and 1.33V for the MC voltage and it crashes more often that left default (~1.15V).
So I'll go back a bit, trying now 1.2-ish to see how this plays out.
I'm just trying to run 2x16 6400MHz XMP, it should be doable with the 13900KF which has an MC SP 76...
Or maybe NOT with this motherboard.

Have some friends struggling with their Apex boards too.

[kvarq]

Much obliged.
Already tried 1.30V and 1.33V for the MC voltage and it crashes more often that left default (~1.15V).
So I'll go back a bit, trying now 1.2-ish to see how this plays out.

I'm just trying to run 2x16 6400MHz XMP, it should be doable with the 13900KF which has an MC SP 76...
Or maybe NOT with this motherboard.
Have some friends struggling with their Apex boards too.
Mine is manufactured Nov, theirs are more recent, so it's not about a bad batch.

[Silent_Scone]

kvarq wrote:
Much obliged.
Already tried 1.30V and 1.33V for the MC voltage and it crashes more often that left default (~1.15V).
So I'll go back a bit, trying now 1.2-ish to see how this plays out.

I'm just trying to run 2x16 6400MHz XMP, it should be doable with the 13900KF which has an MC SP 76...
Or maybe NOT with this motherboard.
Have some friends struggling with their Apex boards too.
Mine is manufactured Nov, theirs are more recent, so it's not about a bad batch.

CPU System Agent is still sensitive this gen, so there's some of that to take into consideration, too.

The board will do 6400 just fine.

[kvarq]

Yeah, I thought that too... 0.89V-ish for SA might have to be increased as well for 6400MHz...