Enermax REVOLUTION D.F. X 1200 W Review 19

Enermax REVOLUTION D.F. X 1200 W Review

on ,
Manufacturer: Enermax
Value & Conclusion »

Result Summary

Test results (AC @ 230 V) - Enermax REVOLUTION D.F. X 1200 W
Test12 V5 V3.3 VPower
(DC/AC)		EfficiencyFan spinning?Noise levelTemp
(In/Out)

Power Factor

5 %4.02 A1.42 A1.42 A60.76 W84.87 %No26.8 dBA41.1 °C0.68
12.12 V5.112 V3.367 V71.59 W33.8 °C
10 %8.35 A2.38 A2.42 A121.30 W90.07 %No26.8 dBA41.9 °C0.85
12.11 V5.075 V3.364 V134.68 W33.6 °C
20 %17.54 A3.55 A3.58 A242.06 W92.24 %No26.8 dBA41.4 °C

0.94

12.09 V5.075 V3.348 V262.43 W33.8 °C
30 %27.39 A4.23 A4.16 A365.38 W92.47 %1189 RPM26.8 dBA48.6 °C0.96
12.05 V5.068 V3.339 V395.11 W35.2 °C
40 %37.06 A4.87 A4.83 A486.17 W92.64 %1193 RPM26.8 dBA50.1 °C0.97
12.02 V5.057 V3.329 V524.80 W35.5 °C
50 %46.44 A6.12 A6.07 A607.29 W92.84 %1200 RPM28.2 dBA37.2 °C0.98
12.02 V5.042 V3.308 V654.09 W36.9 °C
60 %55.98 A7.39 A7.34 A729.66 W92.07 %1205 RPM28.8 dBA41.2 °C0.98
11.94 V5.022 V3.289 V792.53 W38.3 °C
70 %65.50 A8.67 A8.61 A852.97 W91.31 %1483 RPM29.6 dBA42.9 °C0.98
11.93 V4.997 V3.279 V934.11 W39.8 °C
80 %75.89 A8.94 A8.97 A977.86 W90.66 %1870 RPM30.3 dBA45.3 °C0.99
11.91 V4.994 V3.274 V1078.56 W38.3 °C
90 %85.64 A10.12 A10.17 A1102.61 W90.20 %2133 RPM32.4 dBA43.3 °C0.99
11.90 V4.969 V3.265 V1222.42 W41.6 °C
100 %96.12 A11.26 A10.57 A1229.21 W89.81 %2300 RPM33.5 dBA42.1 °C0.99
11.85 V4.955 V3.254 V1368.60 W39.8 °C
110 %105.40 A12.51 A11.67 A1345.56 W88.24%2315 RPM33.5 dBA42.6 °C0.99
11.82 V4.941 V3.249 V1524.91 W38.5 °C

The REVOLUTION D.F. X 1200 W had no issues completing our full range of tests. The efficiency of the unit is very high for an 80 Plus Gold rated PSU, easily meeting its targets even at increased ambient temperature. High efficiency is even achieved at low loads with the PSU reaching almost 85% efficiency at just 5% of the rated capacity and exceeding 90% when the load is at 10%.

When it comes to the fan operation, just as specified by Enermax, the fan started spinning as we exceeded the 20% load mark. The ramp up of the fan was fairly quick with RPMs going straight to almost 1200 RPM. While that might seem quite high, the noise output was still quite well controlled. However, at the 70% load mark the RPMs increased quite sharply and so did the noise output, reaching the maximum rated RPM at the 100% load mark.




Voltage Regulation

Voltage regulation - Enermax REVOLUTION D.F. X 1200 W
Test+12 V+5 V+3.3 V
5 %1.00 %2.24 %2.03 %
10 %0.92 %1.84 %1.94 %
20 %0.92 %1.50 %1.45 %
30 %0.42 %1.36 %1.18 %
40 %0.17 %1.14 %0.88 %
50 %-0.17 %0.84 %0.24 %
60 %-0.50 %0.44 %-0.33 %
70 %-0.58 %-0.06 %-0.64 %
80 %-0.75 %-0.12 %-0.79 %
90 %-0.83 %-0.62 %-1.06 %
100%-1.25 %-0.90 %-1.39 %
110 %-1.50 %-1.18 %-1.55 %







Overall the voltage regulation is well within the ATX spec. The +12 V voltage is regulated very well, with some higher than 2% deviation at the 5% load marker for the two minor rails. While we definitely have seen better performance, the results are still solid.

Ripple

Ideally you want the DC voltage delivered by your power supply to be a completely flat line when looking through an oscilloscope. However, due to the switching nature of ATX power supplies and the less than ideal real world behavior of all the components involved, we get very small fluctuations in output voltage, known as ripple and noise. The ATX spec allows a ripple of up to 120 mV for the +12 V rail and 50 mV for the minor rails.

Ripple - Enermax REVOLUTION D.F. X 1200 W
Test12 V5 V3.3 V
5 %14 mV12 mV12 mV
10 %16 mV14 mV14 mV
20 %16 mV16 mV14 mV
30 %18 mV16 mV14 mV
40 %20 mV18 mV16 mV
50 %22 mV18 mV16 mV
60 %24 mV20 mV18 mV
70 %24 mV20 mV18 mV
80 %26 mV22 mV18 mV
90 %26 mV24 mV18 mV
100%34 mV26 mV20 mV
110 %36 mV26 mV20 mV

While not record-breaking, the REVOLUTION D.F. X 1200 W performs well within the ATX specification for ripple. No unexpected spikes or other lower frequency abnormalities were observed throughout testing.

Below you can find an image of the ripple recorded at 110% of the PSU load.



Short Circuit Protection

Short circuit protection is one of the most fundamental and important protections for a power supply. If a short circuit is detected on any rails, the PSU should turn off and prevent damage to itself and other components.

Short Circuit Protection
+12 V railOperational
+5 V railOperational
+3.3 V railOperational

SCP worked as expected with the unit.
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Nov 23rd, 2024 05:53 EST change timezone

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