That's really unfortunate. I have a kit of b-die ATM, and am awaiting a CPU to test it.
If you can ever find a decent kit, shoot for 6ghz efficiency. I haven't seen anyone go for that in a long while.
@sabishiihito Did you do all of the same pin mods that you would need for the Apex? Pin short and isolation. From here it appears that 6 cores do work:
https://valid.x86.fr/aa73ih