Chapter 2
6
2.2.2
INTEL PENTIUM w/ MMX
TECH (P55C) CPU
The Intel Pentium w/ MMX
Tech (P55C) CPU is offered with dual voltage supply
- 2.8V for core and 3.3V (I/O) interface. The following is the marking for identify
the CPU type. (The following diagram is provided as an example only. It does not
necessarily indicate a valid product marking.)
Fig. 2b CPU Description
(Top Side)
2.2.3
AMD-K6/K6-2/K6-III CPU
The AMD-K6 CPU family requires dual voltage power for operation. The AMD-
K6/166, 200 require a voltage of 2.9V core and 3.3V I/O. The AMD-K6/233
requires a voltage of 3.2V core and 3.3V I/O. (The following diagram is provided as
an example only. It does not necessarily indicate a valid product marking.)
Fig. 2c CPU Description
(Top Side)
Operating Voltage
I/O Voltage
Core Voltage
2.2V
3.3V
2.2V
2.4V
3.3V
2.4V
2.9V
3.3V
2.9V
3.2V
3.3V
3.2V