ECC not detected on AMD EPYC Zen 5 (Turin)

[lunadesign]

Using the latest MemTest86 on a Supermicro H13SSL-NT with an EPYC 9355P (Turin) processor, MemTest86 says:

ECC Enabled: N/A
ECC Polling: Disabled
ECC Injection: Disabled

For comparison, on a Supermicro H12SSL-NT with an EPYC 9262 (Rome) processor, MemTest86 says:

ECC Enabled: Yes (Multi-bit ECC correction)
ECC Polling: Disabled
ECC Injection: Disabled

I don't see anything in the H13SSL-NT BIOS to enable/disable ECC. Am I doing something wrong or is this platform too new?

Thanks in advance!

[lunadesign]

In case it helps, here are some screenshots:

[David (PassMark)]

Can you post the debug log for the 9355T CPU.

See,
https://www.memtest86.com/tech_debug-logs.html

[lunadesign]

Absolutely! Please see attached.

[lunadesign]

I suspect these log entries in the log from the Zen 5 server are probably relevant:

2025-01-26 22:36:07 - find_mem_controller - Could not find controller, enumerating PCI bus...

2025-01-26 22:36:08 - [CONFIG] ECCPOLL cannot be enabled as ECC is not available

[keith]

Thanks for the logs.

We're in the process of obtaining the datasheets to add support for this chipset.
Can you send as an e-mail and we can provide a build once it's ready for testing.

[lunadesign]

Thanks keith....I've sent an e-mail as you requested.

Do you have a rough guess for when a build would be ready? IE, are we talking days, weeks or months?

[lunadesign]

In the meantime, can I still use MemTest86 on this system? Or does the lack of chipset support prevent MemTest86 from detecting memory errors?

[David (PassMark)]

AMD (and Intel) make the ECC documentation secret. That also make the details different for each CPU family. So we need to request many documents. Sometimes we get them. Sometimes we don't. No fixed time frame. Could be tomorrow, Or could be never for some CPU models.

It is likely the EPYC 9355P won't report ECC errors until a software update is done. (We also don't have this model CPU to test with).

[lunadesign]

Got it....thanks! But MemTest will still be able to report non-ECC errors?

[David (PassMark)]

Yes, non ECC error will still be reported. (i.e. any error that didn't get corrected)

[lunadesign]

Got it....thanks!

[keith]

Update - we have added preliminary ECC/memory timings support for the Zen 5 Turin (Model 02h) chipset. This should be available in the next public release.