reading help:
--gpu-ethash-mode:
1 - Create 1 buffer for DAG on GPU if driver allows big enough allocation
2 - Created 2 buffers for DAG on GPU
Any explanation?! Does it help for 4GB cards or not :/
Oh, and I need help trying to run SRBMiner on Ergo
on rig with 470 4Gb cards it starts and immediately restarts itself /latest HiveOS/, maybe didn't configure properly?! I just entered nanopool as pool, nothing else.
Nothing in the log to help

Not helping with 4GB cards.
Also i am sorry but i can't help without a log. If i need to guess i would say the default setup is too much for your overclock/undervolt settings, so try adding parameter
for example.