threadripper ram problem (jbmerrill)

as discussed over private messages can we try to solve this here

Hello,

RE: x399 Professional fatal1ty gaming motherboard

Latest update is that I verified all 8 memory modules (8x16GB) are working just fine with uefi bios p2.0

However, when I then tested each memory slot one at a time, only slots a1,a2 would POST and all other slots resulted in no POST with digital code 'C0'.

I was told that I should be able to POST with a single DIMM in one slot at a time (G.Skill tech support) to verify if they were good, but this was not the case.

Also, I spoke with ASRock technical support, and all they could advise is to RMA the motherboard.

When I first installed the motherboard, I noticed a couple of CPU socket pins that seemed a little bent and the board did not come with a grey plastic socket protector, so I don't know if the socket is damaged and causing CPU to not POST the other slots.

I can only verify that slots a1, and a2 are working correctly with O.S. able to use all 32GB mem, and would greatly appreciate if anyone else has had this problem or knows what to do.

With any other configuration, O.S. is only able to use 1/4 to 1/2 of the memory (128GB=32GB used by O.S. with 96GB as 'hardware reserved')

It doesn't make sense that uefi detects all installed memory if 6 slots are bad.

Please let me know what additional info I should include.

Thanks,

Bryan


Edited by jbmerrill - 09 Jan 2018 at 11:59pm

Thanks much MisterJ,

I am dreading the pain of pulling this rig apart and sending in the MB. It will be a major undertaking, and I may well damage things.

Do you know of any 'tuning' tricks I could try first, such as memory remapping, or frequency/voltage tweaks?

I do not want to damage anything, but don't know what else to do.

I see others with this same problem, so I am thinking that RMA the MB will not solve it, and think that perhaps, I should just run it with 32GB until ASRock has a uefi bios fix.

You and everyone here have been a great help.

Bryan

Edited by jbmerrill - 10 Jan 2018 at 1:54am

Save yourself further pain and anxiety and just RMA the board!

It's pretty hard to damage components if your careful when taking apart or building a rig.

jbmerrill, please RMA the board.  If you do not do it now, you will most likely have to later.  Enjoy, John.