B450M/ac R2.0 PFEH and ECC question

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   Good day to you Xaltar (or any moderator who is monitoring this thread). 
I was trying to make a new thread but I fell on this post instead.
Would it possible to make a new thread regarding memory modules, PFEH (platform first error handling), as well as full ECC support for an ASRock B450M/ac R2.0?
I'm simply wondering if anyone has had full on ECC working on windows and/or linux, plus other modules than the 2 listed often times in the spreadsheet for this specific motherboard.

Thank you so kindly and happy holidays!

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MT550 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Oct 2025 Status: Offline Points: 30	Post Options Post Reply Quote MT550 Report Post Thanks(0) Quote Reply Topic: B450M/ac R2.0 PFEH and ECC question Posted: 18 hours 21 minutes ago at 12:31pm
	Good day to you Xaltar (or any moderator who is monitoring this thread). I was trying to make a new thread but I fell on this post instead. Would it possible to make a new thread regarding memory modules, PFEH (platform first error handling), as well as full ECC support for an ASRock B450M/ac R2.0? I'm simply wondering if anyone has had full on ECC working on windows and/or linux, plus other modules than the 2 listed often times in the spreadsheet for this specific motherboard. Thank you so kindly and happy holidays!

MT550 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Oct 2025 Status: Offline Points: 30	Post Options Post Reply Quote MT550 Report Post Thanks(0) Quote Reply Posted: 3 hours 25 minutes ago at 3:27am
	Additional context - While it is specified in the board's manual that only KSM26ED8/16ME (ECC), TE416G26D819-UHA (ECC) for the vermeer, matisse and renoir architectures and CT8G4WFD824A.18FB1 (ECC), AD4E2133W8G15-BHYA (ECC) & M391A1G43EB1-CPBQ (ECC) for pinnacle ridge, raven ridge and summit ridge. At least from what I can see specified on the board's page. As for the B450M/ac R2.0, I am trying to understand if it's only ECC modules (no ECC mode) or if ECC modules support ECC mode entirely. Deriving from alot of cross referencing I came to the conclusion that any Asrock boards equipped with PFEH can redirect the ECC to the BIOS (controller) or OS directly - partially or fully. So my questions are as follows: 1. Does the board support full ECC mode (not just physical modules) ? 2. Whilst there are specified modules, from what I've heard, the rule of thumb being same family of RAM equates to full ECC support. Has anyone ever tried that out if they've had the chance? 3. If yes to the above, how does ECC run on windows 10 (Home, Pro and Enterprise), as well as linux (Void, Arch and Debian/Ubuntu) ? What began as an inquiry on pcpartpicker led me here, given the lack of documentation of ECC on AM4 platforms is very frustrating. Any PRO cpus pair with good RAM, that's a given much less unofficially some others from what I've heard. To that end, I hope to hear anyone willing to share their experience with this board (or similar). I would also be very happy if this thread could serve as a solid reference for future inquiries. Also props to ECCential, he answered a few of my questions a couple of weeks back. Very helpful and thanks to him! Happy holidays to all.