MZ32-AR0 REV 1 > 3

[cmrho]

must not. the error threshold can be reached in first run, and then DIMM slot was disabled at 2nd run.
i have seen multiple user with similar issue with same micron RAM than yours. have you other RAM ?

I've replaced the CPU to another 7V12 that is clean. Cleaned everything up. No joy. I've order Samsung RAM to test whether it's the Micron memory. But I'm dubious. I have 512Gb of Samsung RAM in my other MZ32 and it does the same memory thing sometimes.

I think it's the MZ32, frankly.

 

[cmrho]

Ok, just for documentation's sake:

The original CPU had an issue, which I don't believe contributed to the memory recognition issue. One corner of the CPU (the triangle corner, actually) had a crack in the PC. It was barely visible, but definitely caused a 'ghost' effect on the built-in video adapter output. The CPU was exchanged for a non-broken one.

On the memory issue:

1) I purchased Samsung memory for troubleshooting, but that was not the issue.
2) The issue was that there was some kind of contact issue with one or more pins of one or more mem slots close to the CPU socket
3) I cleaned the mem slot using IPA and a thin piece of metal jacketed by a thin cotton material - you would think there would be something designed specifically for this, but I couldn't find it.
4) After cleaning and air drying, the system recognized all 16 sticks (8 Micron and 8 Samsung) - and it functions perfectly.

Thanks for your help @RolloZ170 .

 

[RolloZ170]

as I say: "stay clean!"

 

[dmblc]

I have a Rev1 flashed to Rev3, previous owner sold it for cheap bc of a broken PCIe slot. One of the sensors also seems to be faulty (P0_VDD_18 constantly reports above 2.5 volts). Other than that, physically it has no other problems.

The only thing is, I've already enabled Above 4G Decoding but both my Arc A380 and Tesla P40 seem to report that Resizeable BAR is disabled. I've read that I might need to mod the BIOS?

 

[RolloZ170]

The only thing is, I've already enabled Above 4G Decoding but both my Arc A380 and Tesla P40 seem to report that Resizeable BAR is disabled. I've read that I might need to mod the BIOS?

GitHub - xCuri0/ReBarUEFI: Resizable BAR for (almost) any UEFI system

Resizable BAR for (almost) any UEFI system. Contribute to xCuri0/ReBarUEFI development by creating an account on GitHub.

github.com

with UEFITool 0.28 just add
ReBarDxe.ffs
on correct position (read instructions)
you need to run a Tool ( ReBarState ) to set Bar size, there is no BIOS option added.
i can do it for you, just tell me which BIOS version(Rome/Milan)

 

[dmblc]

GitHub - xCuri0/ReBarUEFI: Resizable BAR for (almost) any UEFI system

Resizable BAR for (almost) any UEFI system. Contribute to xCuri0/ReBarUEFI development by creating an account on GitHub.

github.com

with UEFITool 0.28 just add
ReBarDxe.ffs
on correct position (read instructions)
you need to run a Tool ( ReBarState ) to set Bar size, there is no BIOS option added.
i can do it for you, just tell me which BIOS version(Rome/Milan)

Dang I appreciate it. I'm on BIOS R40 (Epyc 7B12).

 

[RolloZ170]

Dang I appreciate it. I'm on BIOS R40 (Epyc 7B12).

package M23_R40 added ReBar.ffs
M23_R40_ReBar.RBU and single files M23,R40 included.
not tested, i don't have MZ32-AR0

Dropbox

www.dropbox.com

 

[dmblc]

package M23_R40 added ReBar.ffs
M23_R40_ReBar.RBU and single files M23,R40 included.
not tested, i don't have MZ32-AR0

Dropbox

www.dropbox.com

Legend, appreciate the help and quick responses. I'll probably only have time to test this on the weekend though.