I have all 5 ports used:
port1 ISP1
port2 ISP2
port3 PC1
port4 PC2
port5 PC3
so no point in changing ports. Just updated the firmware from 3.12 to 6.42.2, maybe that solves my problem for now.
In hap ac2 it says 4 core 716 MHz cpu (IPQ-4018), but is it faster than 1 core 600MHz in RB951G-2HnD?