Po P4 pride P5 - najprv P54C, potom P55C (Pentium MMX)

i486DX-25 (P4)
April 10, 1989 - {$900} 168 pins
25MHz (25x1)
5V 486 Socket 1, 2, 3
8KB unified cache
1.2 million transistors
1.0µm process
165mm˛ die