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Z790 Maximus Extreme + 7200MT/s DDR5 Instability

Selder
Level 7
I am experiencing stability issues when using the F5-7200J3445G16GX2-TZ5RK sticks on an Asus Z790 Maximus Extreme when running the DIMMs on their XMP I or II profile. These instabilities can be any of the following:

- random PC reboots when idle or stressed
- WHEA event code 17 in Windows event viewer
- PCIe device and/or PCIe bus errors

When running the F5-7200J3445G16GX2-TZ5RK sticks without the XMP I or II profile, the rig boots but obviously at default clockspeeds for the RAM.

Here are the specifications of my rig (except for the 2nd kit of DIMMs, currently running only 2 DIMMs in slot A2 and B2) : https://pcpartpicker.com/list/MjQJW4 . BIOS and MEI have been updated to their latest version. Windows 11 22H2 with a fresh (yesterday) Media Creation, standard installation no GPO's or anything. Running without Antivirus, and Memory Isolation is disabled (required for Intel XTU Tool).

I am currently running the same rig with the F5-6000J4040F16G (slower and looser timings) and that's perfectly stable (I can torture the rig with Techpowerup's Memtest64 without error) and run any benchmark and get consistant results. Performance is awesome 🙂

I'm wondering if anyone has an idea what the issue could be. As far as I'm concerned, this should all work "nearly out of the box" (aka: set XMP and done) and I shouldn't have to fiddle around with the gazillion memory tweaking options, should I? 🙂
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49 REPLIES 49

Selder
Level 7
If you'd read a bit about DDR5 you'd know it's quite a bit more complicated as that. Â*Not only did the frequency increased, the whole bus is faster, and the power management has been moved from the motherboard to the DIMMs themselves. Â*It really isn't that easy.Â*

Tried a bunch of different voltages for VDD, VDDQ, Â*Tuning CPU System Agent and the Memory Controller Voltage. Â*Tried to run the last one's DRAM freq ratio on 1:2 too, only a few errors in memtest86, but still. Â*Rig doesn't boot with 1:4.

Pretty strange, I'm beginning to think only a BIOS update with added compatibility for high frequency will help, bummer. Â*

Selder wrote:
If you'd read a bit about DDR5 you'd know it's quite a bit more complicated as that. Â*Not only did the frequency increased, the whole bus is faster, and the power management has been moved from the motherboard to the DIMMs themselves. Â*It really isn't that easy.Â*

Tried a bunch of different voltages for VDD, VDDQ, Â*Tuning CPU System Agent and the Memory Controller Voltage. Â*Tried to run the last one's DRAM freq ratio on 1:2 too, only a few errors in memtest86, but still. Â*Rig doesn't boot with 1:4.

Pretty strange, I'm beginning to think only a BIOS update with added compatibility for high frequency will help, bummer. Â*


Can you even boot XMP 1 stable? With no other OCs? No OC on your processor at all simply XMP?
Z790 Epiphenomenal Raptor Bench

ROG Z790 Apex / Intel 13900KS SP111 P121 E93 MC83
Gskill 8000 kit - TM5 stable at 8200MT/s 38 48 48 121 VDD and VDDQ 1.5v
WD_Black SN850X 1TB 7300MB/s Reads 6300MB/s Writes
LG 32in 4K IPS 32UP83A-W

JohnAb
Level 17
I'm going to throw in a silly idea, but I think I read this suggestion somewhere else on these forums. It fixed something, but as I can't find the post I can't be sure if it helped with memory stability... it was claimed that the CMOS sometimes holds onto old settings..

Kill the power completely, turn off the PSU and pull the CMOS battery. Wait for a couple of minutes and then press the CMOS clear button. Hold for 10 seconds or so. Then pop the battery back in and try again. I'm not expecting this to work to be honest, but it won't take long and you never know....
Z690 Hero, BIOS 3401, MEI 2345.5.3.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.

JohnAb wrote:
I'm going to throw in a silly idea, but I think I read this suggestion somewhere else on these forums. It fixed something, but as I can't find the post I can't sure if it helped with memory stability... it was claimed that the CMOS sometimes holds onto old settings..

Kill the power completely, turn off the PSU and pull the CMOS battery. Wait for a couple of minutes and then press the CMOS clear button. Hold for 10 seconds or so. Then pop the battery back in and try again. I'm not expecting this to work to be honest, but it won't take long and you never know....


I power down the motherboard before proceeding with ever step of mem overclocking, not certain if it's needed, but I do it anyway. lol

1) Disable MCE and ABT set XMP 1 7600
-save out of bios and boot windows let it stabilize to speedstep - shut down and turn off PSU - lights on mobo go out
2) Enter bios set DRAM Frequency to 8000 and CL to 38 VDD and VDDQ to 1.5v
-save out of bios and boot windows let it stabilize to speedstep - shut down and turn off PSU - lights on mobo go out
3) Enter bios and set CL from 38 to 36
-save out of bios and boot windows let it stabilize to speedstep - shut down and turn off PSU - lights on mobo go out

Boot windows check mem values and run TM5

Probably overkill but I do it anyway, lol 🙂

This is a lazy overclock, not the most efficient, yet I have a stinker of a 13600K, a really poor CPU at least by the SP values so I don't want to put any extra time into it, since grabbing a new 13900KS CPU next week.

Using XMP as a template is never as efficient as going manual, but it's easy. lol :cool:

------

Anyhoo, I added this simple XMP 1 as template mem OC, so if the OP feels like he's all out of options - give it a try.

Just remember to "only train the memory" - leave your CPU stock for now. And disable MCE and ABT - Hope this helps. 🙂
Z790 Epiphenomenal Raptor Bench

ROG Z790 Apex / Intel 13900KS SP111 P121 E93 MC83
Gskill 8000 kit - TM5 stable at 8200MT/s 38 48 48 121 VDD and VDDQ 1.5v
WD_Black SN850X 1TB 7300MB/s Reads 6300MB/s Writes
LG 32in 4K IPS 32UP83A-W

Kingdramanyz
Level 7
Did you flash same bios on both bios 1 and bios 2 slots?
Clear cmos. Reboot.put in new settings and force long memory train.

Shinchan0125
Level 10
where did you get 0805? its not on the official web page?

I have g.skill F5-7200J3445G. I didnt have any issue using it in Z790 Maximus Hero. I have set to AI overclock. Unlimited Power, XMPII or I both works.

Shinchan0125 wrote:
where did you get 0805? its not on the official web page?

I have g.skill F5-7200J3445G. I didnt have any issue using it in Z790 Maximus Hero. I have set to AI overclock. Unlimited Power, XMPII or I both works.


What CPU? *

I even used 0806. Links are just above your post.

But unfortunately, still some (very few) errors in Memtest86.

I guess I'll need a 0807...
Set System Agent to 1.25V VDD and VDDQ to 1.420V Per PMIC ME turned off "'enforce all limits". https://imgur.com/64eCugV

Down from hundreds of errors in seconds, to only 2 for a complete loop.

The rig boots just fine, can finish benchmark runs: https://www.3dmark.com/spy/34281414 Should I try to up those voltages even more?

Selder wrote:
What CPU? *

I even used 0806. Links are just above your post.

But unfortunately, still some (very few) errors in Memtest86.

I guess I'll need a 0807...
Set System Agent to 1.25V VDD and VDDQ to 1.420V Per PMIC ME turned off "'enforce all limits". https://imgur.com/64eCugV

Down from hundreds of errors in seconds, to only 2 for a complete loop.

The rig boots just fine, can finish benchmark runs: https://www.3dmark.com/spy/34281414 Should I try to up those voltages even more?


Congratulations, sounds like an improvement. :cool:

Yes, I would not be afraid of 1.500v, that's the max I've used yet some guys using 1.6v, just add "small amounts" of VDD and VDDQ voltage boot into windows and check your mem kit thermals, before proceeding - check all your thermals, keep them in the healthy range.

I went from 5errors in TM5 to 3errors to 1error to none - feels good. All I did was add incremental VDD and VDDQ voltage and one last bios update got me there.
Z790 Epiphenomenal Raptor Bench

ROG Z790 Apex / Intel 13900KS SP111 P121 E93 MC83
Gskill 8000 kit - TM5 stable at 8200MT/s 38 48 48 121 VDD and VDDQ 1.5v
WD_Black SN850X 1TB 7300MB/s Reads 6300MB/s Writes
LG 32in 4K IPS 32UP83A-W

What voltages are you running at?

iBruceypoo
Level 16
I’m TM5 stable - no errors at:

7600 CL36 46 46 121 1.40v VDD/VDDQ
7800 CL36 46 46 121 1.45v
8000 CL36 46 46 121 1.50v

I’m running the Gskill 7600 kit. Haven’t made any other changes from the 7600 XMP profile settings, only DRAM frequency voltage and CL I moved to 38 at first attempt at 8000, then back to 36.
Z790 Epiphenomenal Raptor Bench

ROG Z790 Apex / Intel 13900KS SP111 P121 E93 MC83
Gskill 8000 kit - TM5 stable at 8200MT/s 38 48 48 121 VDD and VDDQ 1.5v
WD_Black SN850X 1TB 7300MB/s Reads 6300MB/s Writes
LG 32in 4K IPS 32UP83A-W