The Free On-line Dictionary of Computing (18 March 2015):
Flip Chip Pin Grid Array
(FC-PGA) The package of certain IntelCeleron and Pentium III processors. FC-PGA processors fit
into Socket 370motherboard sockets.
The Flip Chip Pin Grid Array is similar to PPGA, except
that the siliconcore is facing up and the heat slug is
FC-PGA packaging is used by Pentium III processors, and
Celeron 566 processors onward. Earlier Celeron processors
used PPGA packaging.
Celeron processors are also available in Slot 1SEPP
packaging and Pentium III processors in Slot 1 SECC2
Adapters are available to allow a PPGA Celeron to plug into
a Slot 1 connector.