File:Motorola MC68030RL16B Macintosh IIcx.jpg

A 16MHz low power PGA version of a Motorola 68030 processor, used in most production Macintosh IIcx units. It is compatible with a PGA socket for a standard 68030 processor, but has 4 fewer guide pins (124 vs. 128). It also sports a black lid that resembles a low power QFP version.

Source

 * IIcx motherboard by applefreak, Mac GUI. 2011-12-14.