Chapter 2. System Board Features
Chapter 2. System Board Features
This section includes information about system board features. For an illustration of the system board,
see “System Board” on page 13.
Microprocessor
The microprocessor in the PC 300GL (6272 and 6282) is the Intel Pentium Processor or the Intel Pentium
Processor with MMX Technology. The microprocessor features are:
Intel Pentium Processor
– 8 KB write-through code cache (internal)
– 8 KB write-back data cache (internal)
Intel Pentium Processor with MMX Technology
– 16 KB write-through code cache (internal)
– 16 KB write-back data cache (internal)
– Split power supplies (V
IO
= 3.3 V, V
CORE
= 2.8 V)
– Support for Intel architecture MMX technology
Superscalar architecture
Branch prediction
Power management capabilities
Enhanced floating point capabilities
64-bit data bus, 32-bit address bus
The system board operates with a 3.3 volt microprocessor. The microprocessor plugs directly into a
321-pin zero-insertion-force (ZIF) socket (Socket 7). Socket 7 allows for a performance upgrade. After
installing an upgrade, the internal speed of the microprocessor is updated by setting switches on the
system board. For information on switch configuration, see “Switches” on page 14.
Copyright IBM Corp. October 1997
3
