my 2cents : I'd advice against atx psu use with naomi"2" especially with netdimm+pi+cf powered from the naomi2
it is advised to use a good known working psu (I personally use a meanwell qp-150-3a) have the 5V lane at 5.1V off load, so as the ram module get what they really should be working with IIRC, otherwise, "undervolting" those can mean killing chips
it is advised to use a good known working psu (I personally use a meanwell qp-150-3a) have the 5V lane at 5.1V off load, so as the ram module get what they really should be working with IIRC, otherwise, "undervolting" those can mean killing chips