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No. A 60W power supply works well with a single extruder M Prime One.
You have to add the power of the second extruder and the bed to those 60W to know which power supply you need. Usually your seller or manufacturer can provide you with the power that those components consume.
If you need to calculate the power yourself, the formulas are the following:
- power = voltage x current
- power = voltage squared / resistance
Voltage for both components is 12V. You can find some nominal current or resistance in the specifications, or easily measure the resistance with a multimeter.