Error Q-Code 55 after trying to install 4x32GB RAM Patriot

[xyberbender]

I have a Azus ROG Z690 it was working fine with 2x16GB XPG DDR5 5200 and I decided to upgrade the system from 32GB to 128GB 4x32GB Patriot Viper DDR5 6000MT. This setup has a EK Cooler AIO Vardar S. We proceeded to remove the XPG Memories from A2 and B2 and unmount and relocate the EK Cooler because the tubes were blocking A1 RAM slot. After relocation of the cooler thermal paste of the CPU got cleaned and screws were tightened. Then we proceeded to first test the new memories in slots A2 and B2 were previous XPG were and error 55 emerged. We also tried all memory slots with the new 4 32 GB RAM sticks and error 55 emerged again. It only works with 2X3G RAM if you put them in B1-B2. Something happened with A1-A2 the minute you put something there error 55 shows up. We proceeded to updated Bios but error is persistent. Any suggestions on how to test what happened with A1-A2? Or are there any other issues related to upgrading memory from this ROG to 128GB? Called Patriot and they say memories are 100% compatible with Intel and the motherboard. I’m using Intel I9 Family 6 Model 151 at 3200Mhz. Found a similar issue here https://rog-forum.asus.com/t5/intel-700-600-series/z690-hero-error-code-55/td-p/970362

[Silent_Scone]

Hi @xyberbender 

55 indicates "No memory installed" which potentially means a mounting issue on the CPU side. Are you able to check the mounting pressure again and inspect the socket and CPU pin-pad?

[xyberbender]

We did inspected all the CPU pins with a magnifying glass and also checked the socket, everything looks fine. I did tightened the cooler until I felt resistance, but, is there a way to better test the pressure needed or identify if the CPU is a bit loose?

I found that Ek has a special screwdriver taht can put the right pressure on top of the CPU https://www.amazon.com/dp/B09MZSHNHT/ref=sspa_dk_hqp_detail_aax_0?psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9oc...

They say this: "Upon reaching the .6Nm torque force, an audible click is produced and the screwdriver resets"

Any recommendations to troubleshoot or measure the CPU contact? Currently the system is working with RAM in the A2 and B2 sockets, if I put the two other 32 GB RAM parts then error 55 shows up. 

[xyberbender]

Seems like I am not the only one struggling trying to get 128GB Ram in this motherboard

https://www.reddit.com/r/computers/comments/119rzk4/ideas_rog_maximus_z690_hero_is_struggling_to_boo...

[Silent_Scone]

You'd need to read between the lines with that one. 6000MT @ with 128GB is going to require a reasonable CPU memory controller (on Intel, likely not possible at all). Your issue is detection at stock, so best not to conflate the two.

[Silent_Scone]

Are you using a CPU contact frame?

[inge70]

Which motherboard is it exactly?

I would basically only use RAM that is in the vendor list/RAM support of the motherboard, i.e. that has been tested with this motherboard, especially with full configuration and 128GB/ 4x 32GB modules.

In addition, 6000MT/s with 128GB and full configuration will not be usable. More likely 5200MT/s or less.
But that depends on the memory controller and the specifications of the CPU.

[scyto]

Not sure if this will help, i just swapped from 4 x 16GB DDR to 2 x48 GB so i could get XMPII OC

I installed them slots A2 and B2 as per manual.

I got code 55, even after resetting the BIOS.

In the end I found booting with one stick in A2 let me POST and boot, and then I installed the 2nd stick in B2 and could POST and boot.  Both times the RAM seemed fully seated and had its RGB lights going.  Hope this helps someone, lol.