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Z690 Maximus Apex with G.Skill F5-6400J3239G16G

alexyenov
Level 7
Hello.
I bought a set of modules F5-6400J3239G16G from G.Skill (2x16).
Problem - the memory does not work in XMP mode in 6400 - memtest86 errors fall, windows refuses to work correctly.
Errors in memtest persist even when the frequency is limited to 6200 (but windows worked good in this case).
I tried to raise the voltage to 1.45, it does not help.
I tried to load the default settings in the BIOS, tried to update the BIOS, disabled E-cores, etc. - the result is the same.
Bios version 1505.
Is this a memory defect or a problem with the motherboard? Or something else?

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47 REPLIES 47

Silent_Scone
Super Moderator
Hello,


Got Extreme Tweaker > CPU System Agent Voltage

Test between 1.05v - 1.25v

Go to Extreme Tweaker > Advanced memory settings

Test Memory Controller Voltage to between 1.25 - 1.35v
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Silent Scone@ROG wrote:
Hello,


Got Extreme Tweaker > CPU System Agent Voltage

Test between 1.05v - 1.25v

Go to Extreme Tweaker > Advanced memory settings

Test Memory Controller Voltage to between 1.25 - 1.35v


Thanks a lot for your help, friend!
Unfortunately, it did not work out for me, a huge number of errors still fall when setting the XML profile :((
I tried as you wrote, including the maximum values. By the way, it is strange that despite the manually entered values, others are displayed to the left of them, while they "float", that is, they change in real time during the display.
I don't know what to do next.

I am attaching a set of screenshots from the BIOS.


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alexyenov wrote:
Thanks a lot for your help, friend!
Unfortunately, it did not work out for me, a huge number of errors still fall when setting the XML profile :((
I tried as you wrote, including the maximum values. By the way, it is strange that despite the manually entered values, others are displayed to the left of them, while they "float", that is, they change in real time during the display.
I don't know what to do next.

I am attaching a set of screenshots from the BIOS.



More isn't always better so be sure to test methodically, that's where some people tend to trip up.


Try both Tweak Mode 1 and 2 with the following and select 2T.

These are the more lackluster Samsung sticks.


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

Hopper64
Level 15
I can’t use XMP settings at all with this generation so far.

Use manual settings and dial in the 6400 memory frequency and your primary timings. Then also use tweak mode 2.

Use manual for SAV with 1.249V, VDD/VDDQ 1.40V, MCC 1.35V.

See if that helps.*
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64 wrote:
I can’t use XMP settings at all with this generation so far.

Use manual settings and dial in the 6400 memory frequency and your primary timings. Then also use tweak mode 2.

Use manual for SAV with 1.249V, VDD/VDDQ 1.40V, MCC 1.35V.

See if that helps.*


Hello. Thank you. I tried it didn't work 😞

Hopper64
Level 15
Memtest86 May still throw errors even with manual settings. Use TM5 or ramtest in windows for testing. Clear the cmos and reapply settings manually.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64
Level 15
I have the same memory kit with a 12900ks chip. Mine is working well but there are still errors in memtest. TM5 and Ramtest are stable.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64
Level 15
Post a picture of your dram timing control screen.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64 wrote:
Post a picture of your dram timing control screen.


I found more or less stable settings for 6200 cl32 (completely passed 1 pass in Memtest86 without errors), these are VDD/VDDQ 1.45, CPU SA Voltage 1.2, MC Voltage 1.275 , Maximus Tweak: Mode 2, DRAM CR: Auto.
Timing settings in the screenshots below.
I'll keep this profile for myself for trying to get past 6400 🙂 Looking forward to some good advice!
P.s. why is there no profile for Hynix 6400 in Memory Presets? It would be nice if the developers added...

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