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Power Requirements
2.1 Power Requirements
The AlphaPC 164UX motherboard requires a minimum of a 300 watt power supply.
The power supply must be ATX-compliant.
Table 2–3 Power Supply DC Current Requirements
Voltage
±
+3.3Vdc,
5%
±
+5 Vdc,
5%
±
-5 Vdc,
5%
±
+12 Vdc,
5%
±
-12 Vdc,
5%
Caution:
have a built-in sensor that will drive a signal if the airflow stops. The
sensor is connected to the motherboard connector J35. When the signal
is generated, the speaker generates a tone..
2.2 Environmental Requirements
The 21164 microprocessor is cooled by a small fan blowing directly into the chip's
heat sink. The AlphaPC 164UX motherboard is designed to run efficiently using
only this fan. Additional fans may be necessary depending upon cabinetry and the
requirements of add-in cards and disk drives.
The AlphaPC 164UX motherboard is specified to run within the environment listed
in Table 2–4.
Table 2–4 AlphaPC 164UX Motherboard Environmental Requirements
Parameter
Operating Temperature
Storage Temperature
Relative Humidity
Rate of (dry bulb) temperature
change
Features of the AlphaPC164UX Motherboard
2–4
Current
14 A
25 A
0.5 A
10 A
0.5 A
Fan sensor required. The 21164 microprocessor cooling fan must
Specification
10°C to 40°C (50°F to 104°F)
-55°C to 125°C ( -67°F to 257°F)
10% to 90% with maximum wet bulb temperature 28°C
(82°F) and a minimum dew point 2°C (36°F)
11°C/hour
±
±
2°C/hour (20°F/hour
4°F/hour)
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