XMP Fails on Rog Strix Z790-E Gaming & cmos doesnt fix

[ManCaveMike]

corsair ram xmp issue

Here is the uncut video to best show the issue(its 33 minutes long)  I think it is the ram, as I can reproduce the issue on 2 motherboards, but my gigabyte Z690 Arous Elite will default after an hour.   Your motherboard is 110% bricked and unable to boot unless I have a different stick of ram.  Cmos on back of the motherboard does nothing at all.

Posting this here to see if others think this is a ram issue or mobo issue.

Motherboard has latest bios.

[lmacmil]

I have a B760M board but there were at least 2 BIOS releases that disabled XMP.  Asus seemed more interested in proving that it was my system and/or RAM but if XMP works on one BIOS and not on another with no system changes, it would seem clear that the BIOS is the problem.  They finally fixed it and the description of the BIOS that restored XMP said " improve DRAM compatibility."

[ManCaveMike]

Well, I have the latest bios, and I cant really change it, since I am on a 14900K, and need the bios for the issues 14th gen has with microcode.

But the issue also happened on 13700K with a Z690 arous, so 2 different mobos and cpus, but atleast on the z690 I can recover to Bios.  On this board, it is black screen of death.  Cmos clear doesnt recover.

[Silent_Scone]

Hi @ManCaveMike 

Only so much troubleshooting you can do with this (you'll have to forgive me for not watching a 33 minute video lol)

1. Reseat the CPU. DIMM detection issues can be due to poor pin-pad contact or bad mount. Be sure to inspect the socket and CPU pin pad.

2. Clear CMOS

3. Insert 1 module at a time into slot A2 and attempt POST to check both modules are detected and working at Optimised Defaults.

4. Enable XMP 1.

If no POST, try to reduce DRAM Frequency.

For more information on XMP/EXPO please see here.

[ManCaveMike]

1. did that

2. Did that too(entire point of the video, cmos didnt work)

3. did that too
4. The other point, XMP doesnt work on your board with my ram, and leads to a black screen. 

 I understand you not wanting to watch 33 minutes, but everything you just suggested I do in the video as proof, because I am confronted with a very odd issue.  The only way to reset back to default is using a different stick of ram.  Very odd, but your cmos bottom on back of the mobo is not doing the job.

[Silent_Scone]

Well, I don't think the issue is with wiping the CMOS at all. By your admittance, the issue is also occurring on a board from another vendor. I'd recommend returning the memory kit, and if not doing so already, make sure to purchase one present on the Memory QVL for the Z790-E Gaming.

More info on XMP/EXPO/Memory Overclocking here

 

[ManCaveMike]

Yeah, but on the oher board I can recover back into the Bios.   With the ASUS Board, my bios is 100% bricked, as I show in the video, and the only way to recover is by using a different set of ram.   That has to be something with the mobo, that the cmos doesnt work. 

[Silent_Scone]

Is the memory kit on the QVL? You haven't stated which kit you're even using.

[ManCaveMike]

I stated everything in the video, figuring id save myself having to answer all these questions, next time I wont bother making a video lol

Thid id my ram.  Not sure what a qvl is.  Sorry

[Silent_Scone]

Sorry, just not enough time in the day for that! No disrespect to you, at least you documented it which is more than most do 😁.

 Motherboard vendors employ what's known as the QVL (Qualified Vendor List) which gives users a list of components that have been verified as tested on a particular motherboard. At the very least, if the kit is present on the QVL it should work at defaults. (No XMP Overclocking @ JEDEC speeds).

I can't see the PN on the QVL, just this SKU.

https://rog.asus.com/uk/motherboards/rog-strix/rog-strix-z790-e-gaming-wifi-model/helpdesk_qvl_memor...

From a support perspective, I'd suggest returning the memory kit and purchasing one that is validated on the QVL list above.