Won't POST with 128gb DDR5, will with 64gb DDR5, Help?

[Omess]

Hey everyone!

I am having a lot of trouble with 128gb of DDR5 5600Mhz memory in my PC here.

I've checked that both the MOB and the CPU supports 5600mhz memory and a total of 128gb.

The kits are 2 of the same kind from the same store, nothing mixed.

 

 

CPU: i7 14700k

GPU: Radeon RTX 7900 XTX TUF OC

Memory: 2 sets of Kingston FURY Beast RGB DDR5 5600MHz 64GB (KF556C40BBK2 - 64)

Motherboard: Asus Proart z790

 

So my problem is as follows:

- 64gb memory inn, normal or default settings, it will boot

- 96gb memory inn, it will boot but the Windows 10 is super unstable

- 64gb memory inn, XMP2 (5600mhz, 40-40-40-80), it will boot

- 128gb memory inn, normal or default settings, it won't boot

- 128gb memory inn, XMP2 (5600mhz, 40-40-40-80), it won't boot

- 64gb memory inn, XMP2 (5600mhz, 40-40-40-80) with DRAM VDD Voltage set to 1.300, DRAM VDDQ Voltage set to 1.300, PMIC Voltages set to Per PMIC.

 

For each version that has managed to get to BOOT I've let it go to Windows.

For each version that hasn't boot, I haven't been able to get to Safe BOOT.

 

Any suggestions what I am to do?

 

Edit:

I've already flashed the BIOS to version 2002, which is the newest.

Also I've check that all of the memory sticks are able to boot the computer, I.E. none of them are dead

Edited March 8 by Omess
Update informasjon

[emosun]

did you install any of the bios updates the board has had

[Omess]

10 minutes ago, emosun said:

did you install any of the bios updates the board has had

Hey!

I forgot to add this, to the post.

But yes! I've updated the BIOS to version 2002, which should be newest.

[Tetras]

43 minutes ago, Omess said:

I've checked that both the MOB and the CPU supports 5600mhz memory and a total of 128gb.

With 13th gen the maximum supported speed for 4 sticks (dual rank) is 4400, I'm not aware if this changed with 14th gen.

 

While your memory is on the QVL, it says 1 or 2 slots, not 4.

[Chowy]

4 hours ago, Omess said:

Hey everyone!

I am having a lot of trouble with 128gb of DDR5 5600Mhz memory in my PC here.

I've checked that both the MOB and the CPU supports 5600mhz memory and a total of 128gb.

The kits are 2 of the same kind from the same store, nothing mixed.

 

 

CPU: i7 14700k

GPU: Radeon RTX 7900 XTX TUF OC

Memory: 2 sets of Kingston FURY Beast RGB DDR5 5600MHz 64GB (KF556C40BBK2 - 64)

Motherboard: Asus Proart z790

 

So my problem is as follows:

- 64gb memory inn, normal or default settings, it will boot

- 96gb memory inn, it will boot but the Windows 10 is super unstable

- 64gb memory inn, XMP2 (5600mhz, 40-40-40-80), it will boot

- 128gb memory inn, normal or default settings, it won't boot

- 128gb memory inn, XMP2 (5600mhz, 40-40-40-80), it won't boot

- 64gb memory inn, XMP2 (5600mhz, 40-40-40-80) with DRAM VDD Voltage set to 1.300, DRAM VDDQ Voltage set to 1.300, PMIC Voltages set to Per PMIC.

 

For each version that has managed to get to BOOT I've let it go to Windows.

For each version that hasn't boot, I haven't been able to get to Safe BOOT.

 

Any suggestions what I am to do?

 

Edit:

I've already flashed the BIOS to version 2002, which is the newest.

Also I've check that all of the memory sticks are able to boot the computer, I.E. none of them are dead

Check task manager and click onto RAM and check how many slots are plugged in if it says 1/4 connected you might have a faulty RAM that yes boots when turned on but does nothing and lags the pc badly.

[Robchil]

Wait for later bios updates to insert anything in slot 1 and 3 from the cpu.. if you get it to work your lucky. But most boards are not stabile with 4 sticks of DDR5 rams yet. 

Keep in mind your sticks are two sets, keep the sets separate. Put one set in 2 and 4 for now, or you will create more problems for yourself.

 

If you realy want 128GB ram.. get one set of 2 64GB sticks. 

 

EDIT: i see there are some 4 stick kits out there, those would be a better chance of getting it working than 2 64GB kits. 

 

[pythones]

10 hours ago, Robchil said:

Wait for later bios updates to insert anything in slot 1 and 3 from the cpu.. if you get it to work your lucky. But most boards are not stabile with 4 sticks of DDR5 rams yet. 

Keep in mind your sticks are two sets, keep the sets separate. Put one set in 2 and 4 for now, or you will create more problems for yourself.

 

If you realy want 128GB ram.. get one set of 2 64GB sticks. 

 

EDIT: i see there are some 4 stick kits out there, those would be a better chance of getting it working than 2 64GB kits. 

 

Hey I also built the PC with Omess. The PC just boots into safe mode even though XMP is disabled. Tried everything now even cleared the CMOS, unable to find where the BIOS battery is tho, maybe it’s under the PROART plastic plate. We have looked around now and we do see somone more lucky with the same board has managed 4 sticks (not kit) up to 6000MHz. So I am guessing this is just random luck based on both the RAM controller on CPU and the RAM itself. Yea we checked out the QVL list before buying ram, we first looked at 4 stick sets but nothing was in store super long waiting time and one of the PC’s for editing had just died so needed something fast. Altought there are some 4 sticks listed there on the QVL even those ones are also just listed for socket support 1 and 2 and not 4, so we thought based on PC building before (this was with DDR4 RAM) since both the 2x32 kit and 4x32 kit had the exact same specs and even the socket support were the same it was a good chance it could work. But yea as we now have figured out 4 sticks of DDR5 is not stable at all yet, even in 2024 which is insane. Even manufacturers say that buying 4 stick kits are not guaranteed to work, just have a higher percentage of them working since it’s the same batch.

So all in all we just gonna return them and not buy the 4 stick kits as well since there is no support for 4 socket support on them as well. Gonna choose 2x48GB for now.

[Robchil]

It's also a difference if the sticks are double sided or not... 4 single sided 32GB sticks might be easier to get to work, at lower speeds atleast, noone seems to get any running stabile with XMP..