25
Clearance Requirements
Your CPU comes with a heatsink mounted on top. To maintain proper
airflow once the upgrade is installed on the system board, the CPU and
heatsink require certain space clearances. The clearance above the
CPU’s fan/heatsink must be at least 0.4 inches. The clearance on at
least 3 of 4 sides of the processor and heatsink must be at least 0.2
inches. All cables (for floppy drive, hard drive, CD-ROM, etc.) must be
routed clear of the CPU and its airspace.
Fan Exhaust
The CPU must be kept cool by using a fan with heatsink. The tempera-
ture of the air entering the fan/heatsink cannot exceed 45
o
C (113
o
F).
The ambient or room temperature must be below 37
o
C (99
o
F).
Jumper JP26
Modem Ring-on Select
The 586ITB board is equipped with
an autodetection of receiving mo-
dem ring when your system is in
power-off situation. Set jumper
JP26 pins 1, 2 to on when connect-
ing COM1 port (CN1), set pins 2, 3
to on when connecting COM2 port
(CN3), or set to off to ignore auto
detection.
Off: Disabled
(default)
1
2
3
Jumper Settings for Modem Ring-on
2-3 On: COM 2
1
2
3
1-2 On: COM 1
1
2
3
