ECC Error injection AMD 79503DX

[MysteryGuy]

Hi;

I am setting up a new 'Asus Proart X870E-Creator Wi-FI' motherboard with an AMD 7950X3D processor and Kingston ECC 5600 MHz DDR5 memory. (Running at 5200 MHz). BIOS version 0706.

Using Memtest86 V11.1 Pro I am able to see that the system seems to have ECC enabled. I am allowed to set 'ECC error injection' to enabled in the memtest86 settings.

During the test I see lines about

'[ECC Inject] Injecting ECC error for AMD Ryzen Zen 4 (60h-6fh)'

but I don't see any messages about errors being detected. And all 4 passes completed successfully.

Can I assume that if error injection was actually working I would see a message about detected errors (that were being injected) in addition to the injection messages?

Is this (ECC error injection) supposed to work with this setup?

Thanks;

[David (PassMark)]

If it was working you should see the (simulated) ECC errors.

But in most AMD BIOSs the injection feature is disabled for security reasons.

[MysteryGuy]

I did find a BIOS setting labeled something along the lines of 'Disable Error injection". Leaving it at 'auto' or setting it to 'Disabled' seems to run the same way (showing the injection message but no obvious errors detected).

Setting it to 'enabled' results in memtest86 showing an additional message of

'**Warning** ECC injection may be disabled for the AMD Ryzen Zen 4 (60h-6fh)"

after each injection message.

They at least give the impression that this is (should be?) select-able.

I'm hoping at this point that this means more of 'error injection isn't working' and less 'injection is o.k. but ECC isn't really working'.

[David (PassMark)]

One would have thought that enabling that injection setting in BIOS means it is fully enabled.

I have read there were some bugs in AMD's AGESA firmware that prevented it from working in some releases.

Over the years we have been told several different things for ECC on AMD's consumer CPUs.
Including: Injection is disabled and will never work on AM4 & ECC error reporting doesn't work, but ECC correction does. AMD should properly document the situation.


See also
https://forums.passmark.com/memtest8...3912#post53912