American Megatrends Enterprise-II User Manual page 10

Description
Processor Type and Speed
The Enterprise-II EISA motherboard comes
with either an 80486DX operating at 25,
33, or 50 MHz or an 80486SX operating at
25 MHz. The Enterprise-II also supports
future Intel processors and upgradable
processors. 80486SX-equipped Enterprise-II
motherboards support an 80487SX operating
at 25 MHz.
Heat Sink for 50 MHz CPUs
All Enterprise-II EISA motherboards with
50 MHz 80486DX CPUs are also equipped with
a heat sink to help dissipate the
additional heat.
Processor Speed
All Enterprise-II motherboards have two
clock speeds: high or low. The high clock
speed is factory-set to 25, 33, or 50 MHz.
The low clock speed is achieved by adding
the appropriate number of software delays,
depending on the speed of the processor
used on the motherboard, and emulates an
IBM AT running at 8 MHz.
Speed selection is through the turbo
switch or the keyboard (<Ctrl> <Alt> <+>
or <Ctrl> <Alt> <->).
2
Chapter 1 - System Overview