version 1.0 28
DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
28
MT DT SFF USFF
Power Supply Wattage
305W
305W
High
Efficiency
280W
280W
High
Efficiency
275W
275W
High
Efficiency
220W High Efciency
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 Efciency
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
powEr
