X670E TAICHI RAM Issue

This is a pretty old thread now, I doubt any of the original posters are still following
it. If you would like to make your own thread you can follow the instructions here:
https://forum.asrock.com/forum_posts.asp?TID=113504

ok an update: after I got a new board, I tested everything (really everything) again.

Used a different power supply (Corsair TX 650).
Disconnected all consumers (SSDs, NVME) etc.
CMOS reset again

Here it comes:

With a placement of the two modules (2x 16GB) on B2 and B1 it works even with everything (all periphery) connected.

What do you think?
Does there seem to be an incompatibility of the EXPO modules? If so, should I have to open an RMA request... or will a future BIOS Update help here?

ehcbaer wrote: hello all, Trident Z5 F5-6000J3038F16GX2-TZ5NR (actually 2x)

So, two kits of two? As has been said, bad idea with DDR5, better get two bigger modules instead of four smaller ones. Plus, 64 GB is only necessary if you use special professional software or workloads that need >32 GB. Otherwise, there is no benefit from just having that much RAM, you'd just make things more difficult for your memory system. The only benefit comes when you have something that actually utilizes that much RAM.

ehcbaer wrote: The system does not boot up with double RAM. Originally it even worked for 2 weeks.

This is weird.

ehcbaer wrote: no solution so far. So I have to use only one RAM bar in B2.

It doesn't even want to work with two modules in A2+B2 now? There is some kind of deterioration in the system. You could check the socket for any bent pins. Now that AMD also uses an LGA socket, the pins are equally as fragile as on Intel, and a lot of them direcly connect to the RAM slot contacts.

What is your PSU (model and age) and what's your CPU cooler?

I also have same issue with x670e steel legend, 7950x and 4 modules 32GB Samsung M323R4GA3BB0-CQKOD(DDR5 PC5-38400).
With 2 modules i can run with bus 6000c36 easily but with 4 modules i can only get bus 3600
Now i am using latest bios version with 1.14.AS06 Beta

Yes, that comes on top of that. You are an early adopter of a brand new platform, which is also AMD's first foray into DDR5 technology. From what i hear, it's not the total catastrophy that it was with the first Ryzen generation where people were having issues left and right and begging for new BIOS updates to solve the most annoying things. But you can't expect smooth sailing either for the first weeks and months.

There are just the first early adopters reporting back to the board manufacturers about BIOS issues and lack of RAM optimization, so the improvements based on user feedback are just slowly picking up some steam. With any totally new platform, you will see rather big improvements being made in the first couple BIOS updates.

However, even on Intel 600-series, there still are issues with XMP support once you get to DDR5-6000 (and certainly above), as well as being restricted to lower frequencies when using four modules. The Z690 boards have almost a year of BIOS updates under their belt, but some fundamental limitations about the early DDR5 technology obviously cannot be solved completely.

Anyway, if you expect zero problems, then you can't be an early adopter, you have to wait at least a few months for the first few BIOS updates to have ironed out the worst annoyances. If you want the latest and greatest tech right after it was released, you're gonna have some "bananaware" that slowly ripens over time.

And i'm not even sure they can ever get DDR5-6000+ working flawlessly with four high-capacity dual-rank modules. This might be too much to ask for the first generation DDR5 solutions.