Apple Macintosh Performa 577 - Manual (Page 94)

Upgrades Macintosh Processor Upgrade - 2
and a 68LC040 processor.
The upgrade board includes
the PowerPC 601 processor
on board and a socket to
accept the customer’s
68LC040 processor.
Note:
The Macintosh
Processor Upgrade for the
Performa 520, 550, and
560 consists of a Macintosh
LC 575 logic board, the
Macintosh Processor
Upgrade Card, a new rear
panel, and the 575 product
ID label.
To install this upgrade,