Power converters in the LHC are controlled by the  second generation of an embedded computer known as a  Function Generator/Controller (FGC2). Following the  success of this control system, new power converter  installations at CERN will be based around an evolution  of the design – a third generation called FGC3. The FGC3  will initially be used in the PS Booster and Linac4. This  paper compares the hardware of the two generations of  FGC and details the decisions made during the design of  the FGC3