1.5V WTF ?!
Its probably only not working with bitburners because the 4 more chips draw power the power supply cant provide. So it begins to start hashing lower. At least i now know that im nearly at the max for my bitburner.
The reason for the "WTF" is the fact that the chips were to be run at 1.2V and are still ok running at 1.5V. I'm just surprised that they're still alive with such excessive overvolting.
Not talking about the capacity of the voltage regulators.