Yeah, it might get confusing. I won't post anymore here, but rather in the ticket.
I haven't done anymore yet: busy with work and stuff, and now there's a power failure at home.
This might not be of much help, but i haven't seen you trying it in the former posts.
I have 2GB in one module. I reseated it during my first round in this thread, and have now done so again.
Have you tried plugging it in another seat?
Try the one left of the cpu, CFE and AmigaOS4 can use ram wherever it's placed (it's just to minimize errors to place it in channel 0)
I don't really know what CFE is showing and doing but from a logical point of view...if it's rebooting/breaking after this
[HELO][DRAM]SDRAM: ECC off, Non-ECC DIMM used on channel 0.
there's something wrong with your memory, as it's found but not initialized/used and, as it was shown a lot in your last log, if it breaks here
it might be because it breaks on initializing the PCI chain/PCI cards because it doesn't even reach/show [PCIH][PCIB][PCIS]
I don't know what [AREN] mean or does, but it might be worth a shot to remove "all" PCI cards (if you haven't done so) set up everything to use onboard (sound) respectively the cards (LAN/Gfx) that are known to work from Amikit.
Just an idea and a complete shot in the dark