Z690 Maximus Apex with G.Skill F5-6400J3239G16G

[alexyenov]

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?

[Hopper64]

Having trouble with making changes in memtweakit. Dialed in most settings. Especially the primary and secondary timings. Is there another application capable of making changes to the timings? Primary timings and voltages helped go through ramtest for 15 minutes until there was one error. Big improvement. TM5 had only 3 errors in 1 hour and 20 minutes. Another big improvement! I think this 4 dimm board is going to be the issue compared to the Apex.

[bscool]

Changing tCL in memtweakit has no effect in Windows you can set 0 and it will show it changed but obviously hasnt. Also it doesnt train rtls like it would setting tCL via bios and booting.

I wouldnt use memtweakit to set timings anyways since if cant boot them no real point. I think he showed you his timings so you know what he used not to set them in Windows via memtweakit.

Some timings cannot be changed in memtweakit as they are connected to other timings.

[Hopper64]

Thanks. Figured I would need to go into bios for adjustments.*

[sebagsm]

hi!

managed out something with 6400 rams.. ? 🙂 thansk

[bscool]

sebagsm wrote:
hi!

managed out something with 6400 rams.. ? 🙂 thansk

Not sure what you are asking? If you have a good Apex it should run 6400 kit easy. There are even cheaper 4 dim MB running 6400 kits.

Look at Gskill ram config and you can see many vendors have there MB on the 64000 kit https://www.gskill.com/qvl/165/371/1642064625/F5-6400J3239G16GX2-TZ5K-F5-6400J3239G16GA2-TZ5K-QVL

But if you have one of the "bad" Apex it might not even run 6000. I have 2021 Apex and it tops out around 6400. Same CPU and memory can pass Karhu and y cruncher in 2022 Apex.

[sebagsm]

bscool wrote:
Not sure what you are asking? If you have a good Apex it should run 6400 kit easy. There are even cheaper 4 dim MB running 6400 kits.

Look at Gskill ram config and you can see many vendors have there MB on the 64000 kit https://www.gskill.com/qvl/165/371/1642064625/F5-6400J3239G16GX2-TZ5K-F5-6400J3239G16GA2-TZ5K-QVL

But if you have one of the "bad" Apex it might not even run 6000. I have 2021 Apex and it tops out around 6400. Same CPU and memory can pass Karhu and y cruncher in 2022 Apex.

I just changed my 6000 gskill rams to 6400. on 6000mhz everything was stable (manual not xmp). but the 6400 I cant figure it out ... can you please post your settings?

thanks

[bscool]

sebagsm wrote:
I just changed my 6000 gskill rams to 6400. on 6000mhz everything was stable (manual not xmp). but the 6400 I cant figure it out ... can you please post your settings?

thanks

If you cannot get 6400 XMP stable it is most likely the MB slot 1 is weak. Easy way to test it remove slot 1 and test 6400 to 6600 for Karhu, memtest, y cruncher etc and if it passes then try slot 1 alone and if it fails it is the MB. Just have to lower memory speed or RMA.

[tawzzer]

I originally had corsair 5200, and struggled to get it to run at XMP until I swapped to the other memory slots, after which it ran OK, I could even bump it up to 5400, without changing anything else, but it wasn't stable and would blue screen every couple of days. I now have the same GSkll kit as OP, again I had some initial issues with XMP, I think I updated the BIOS and they then worked correctly at 6400MT/s, again I can get it to run at 6000, but it will blue screen occasionally so I have it at 6400.