Dell OptiPlex 755 - Manual (Page 28)

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Dell™ optiplex™ 755 technical guiDe
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Power Supply Wattage 305W
305W
High
Efficiency
280W
280W
High
Efficiency
275W
275W
High
Efficiency
220W High Efficiency
External PSU
AC Input Voltage Range
90-135A/
180-
264A
90-264A
90-135A/
180-
264A
90-264A
90-135A/
180-
264A
90-264A 90-264A
AC Input Current
(low ac range/high AC range)
9.0A/4.5A 4.5A/2.3A 9.0A/4.5A 4.5A/2.3A 8.8A/4.3A 4.3A/2.2A 3.2A/1.7A
AC Input Frequency 50/60Hz 50/60Hz 50/60Hz 50/60Hz 50/60Hz 50/60Hz 50/60Hz
AC Holdup Time
(50% load)
16ms 16ms 16ms 16ms 16ms 16ms 10ms at 100% load
Minimum Efficiency 65% 80% 65% 80% 65% 80% 85%
Energy Star 4.0
Compliant Power Supply
✓ ✓ ✓ ✓
PFC (Active) ✓ ✓ ✓ ✓
DC Parameters
+3.3v Output 17.0A 17.0A 10.0A 10.0A 5.0A 5.0A
+5.0v Output 22.0A 22.0A 15.0A 15.0A 18.0A 18.0A
+12.0v Output 18.0+18.0A 18.0+18.0A 16.0A 16.0A 17.0A 17.0A 18.0A
+5.0v Auxiliary Output 4.0A 4.0A 4.0A 4.0A 4.0A 4.0A
-12.0v Output 1.0A 1.0A 0.5A 0.5A 0.5A 0.5A
Max Total Power 305W 305W 280W 280W 275W 275W 220W
Max Combined
+3.3v / +5.0v Power
150W 150W 108W 108W 106W 106W
Max Combined
12.0v Power
264W 264W N/A N/A N/A N/A
BTUs/h
(based on PSU max wattage)
1600 1300 1468 1195 1444 1171 880
3.3v CMOS Battery
(type and estimated battery life)
3-V CR2032 lithium coin cell. Est. 5-year life
RTC accuracy
(time of day)
Drift 2 seconds per month
Power Supply Fan
Sleeve
bearing
Sleeve
bearing
Sleeve
bearing
Sleeve
bearing
Ball
bearing
Ball
bearing
None
Power Supply Meets Requirements of:
Energy Star 4.0
Compliant Power Supply
N Y N Y N Y Y
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