Z690 DRAM Training Voltage

[Guzzi5]

I’m trying to locate the setting for initial dram training voltage. Would anybody help me pin point this in the bios for me?

I want to run 1.45v initial then eventual at 1.5v for DRAM 

Spec:

z690 DDR4 - 4400 Viper SR b/die 

[Silent_Scone]

Hi @Guzzi5 

Is there a particular reason why you want to run things this way? Looking on the DDR5 Apex, eventual voltage settings are only available for MCVDD and Input voltage under Tweakers Paradise - both of these should rarely be needed, at least for ambient overclocking. 

If using the search function for "eventual" doesn't find anything, then it's likely the setting does not exist for DRAM voltage. However, setting a fixed DRAM voltage should be enough.

[Guzzi5]

Hi @Silent_Scone 

Thank you for this response & hope its still ok to be talking DDR4 in 2024. This is my first Asus ROG board so I am not to familiar with the bios. The machine is currently being used in my partners gaming rig. 

We are both still running DDR4 Samsung B-die sticks at 4000 Gear1 CL15 with 65535 tREFI with working tested 'generic b-die secondary and tertiary timings' in both machines (1.24sa, 1.35vddq). However I was under the impression that by setting a lower DRAM boot voltage it results in a more stable memory trained values. The sticks are happy at 1.47v I just like to put 1.5v in them as they have cool air blowing over them, pulling air from the top of the case.

Anyways the problem occurs while playing the finals & lethal company. It is apparent that the asus board is not happy and these games will crash to desktop. tcke value is at 8 btw. Now I am wondering that it could the case that the IMC may not like 4000 G1 or that the memory trained values are not 100% stable due to the 1.5v boot voltage. However when just changing the ram speed to 3600 same issue with these games crashing will occur. It will play every other game just fine for example with hours of OW2. 

My main question is how would you go about stabilising this board to boot more stable memory training values. I may just put in 1.47v or 1.45v and it will be ok. However is there another way to this? Will 'MC initial boot voltage' help? I'm not even sure what values the MC should be? It looks to be linked to DRAM v from the bios screen 

Any help will be appreciated and thank you for your time.

Specs ASUS ROG Z690 D4 - BIOS 3101 - 13700KF - 16gb VIPER DDR4 4400 SR - RTX4080 - win11pro