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Selecting the CPU Frequency
CPU voltage auto-detection and allow user to set CPU frequency
through BIOS setup, no jumper or switch is needed. The correct
CPU information is saved into EPROM, with these technologies,
the disadvantages of Pentium base jumper-less design are eliminated.
There will be no worry of wrong CPU voltage detection and no need
to re-open the housing if CMOS battery loss. The CPU frequency
selection is set by going into:
Choose "CPU SPEED SETTING" from the BIOS and a screen with
frequency/voltage control items appears.
CPU Clock Ratio
This item lets you select the ratio of Core/Bus frequency. Have
the following selection: 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x,
7.0x, 7.5x,8.
CPU Host/PCI Clock/PC133
This item lets you set external clock (bus clock). The possible
settings are 66,100 and 133 MHZ....
Clearance Requirements
To maintain proper airflow once the processor is installed on the
mainboard, the processor and fan heatsink require certain space
clearances. The clearance above the processor must be at least 0.3
inches. The clearance on at least 3 of 4 sides of the processor and
fan heatsink must be at least 0.2 inches. All cables (for Floppy drive,
Hard drive,CD-ROM,and so on) must be routed clear of the proc-
essor and its airspace.
Fan Exhaust
The processor must be kept cool by using a processor with heatsink
and fan attached . The temperature of the air filled with the fan/
heatsink cannot exceed 45
perature must be below 37
C(113
F ) . The ambient or room tem-
O
O
C ( 99
F) .
O
O
Chapter3 Installation / 17
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