It is good to hear that you are beta testing on AMD CPUs. In my experience UEFI is the biggest roadblock when installing eCS 2.2b2 on modern hardware.
Can you describe the problems, so I can test for them?
I didn't have any trouble installing eCS 2.2b2 to my A6 with UEFI. The only problem that I had installing to my Lenovo ThinkPad L530 (Intel) with UEFI, is that I need the QSINIT loader to have access to more than 512 meg of memory. Sound doesn't work properly in either one, but that is UniAud, not eCS 2.2b2 itself. ArcaOS beta is still waiting for a new UniAud (don't know what will be in the GA).
I had to go into the motherboard 'bios' and switch the motherboard to 'Legacy Mode' to install eCS 2.2b2 on my ASRock 970 Extreme3 R2.0. No surprise there I expect. The CPU is an 8 core FX 8320E. The harddrive is a SATA 3 SSD. The onboard NIC works and I'm happy with the machine's performmance for now.
Installing eCS 2.2b2 directly on the TP E555 was impossible though. My workaround was to do the install on a SSD in a Thinkpad EDGE E525 and then to remove the SSD and reinstall the SSD in my TP E555.
I suspect that may have something to do with the SSD. I don't have one of them, but I do know that boot timing, on faster systems, can cause problems. SSD speeds it up even more, so it is entirely possible that something messes up during boot. So far, I haven't seen any hint of boot timing problems, with ArcaOS, but that depends on the hardware, and I haven't tested with all of my systems, yet.
Again I had to go into the motherboard 'bios' and switch the motherboard to 'Legacy Mode'. Thereafter three problems arose during installation on the Lenovo TP E555:
1) Loading of the virtual floppies into RAM would stall around 2/3rd the time on varying installation disks (1st, 2nd or 3rd),
2) There was a problem with selection of system drivers (I forget the details), and
3) Either the onboard laptop keyboard or the laptop touchpad would not work, sometimes both, sometimes the problem would switch from one device to the other.
I ended up disabling the two USB3 ports and reverted to USB2 in 'bios', attached USB keyboard and USB mouse but was unable to access a USB floppy drive to load in the eCS key. Only two USB devices worked at a time.