Is it possible to adapt this PSU to fit the older style S4?
Not with the PDI connectors but with the ones fitted with a nut and bolt?
Not with the PDI connectors but with the ones fitted with a nut and bolt?
Yes. BITMAIN AntMiner APW3-12-1600 PSU Series hat is own separate power board to connect the PCI-E cables with S4 cables.
Named S4 Power_Board V1.0
but you still need minimum 210V