Enermax PlatiGemini 1200 W Review 14

Enermax PlatiGemini 1200 W Review

on ,
Manufacturer: Enermax
Value & Conclusion »

Result Summary

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

Power Factor

5 %4.00 A1.43 A1.45 A60.90 W86.30 %No26.8 dBA39.8 °C0.71
12.20 V5.087 V3.327 V70.57 W30.8 °C
10 %8.31 A2.41 A2.45 A121.65 W91.44 %No26.8 dBA42.8 °C0.83
12.19 V5.071 V3.318 V133.04 W31.4 °C
20 %17.40 A3.66 A3.68 A242.36 W92.59 %No26.8 dBA44.7 °C

0.95

12.17 V5.046 V3.296 V261.74 W32.9 °C
30 %27.22 A4.27 A4.21 A365.26 W92.89 %No26.8 dBA42.2 °C0.97
12.12 V5.036 V3.288 V393.21 W33.7 °C
40 %36.87 A4.92 A4.90 A486.34 W93.31 %724 RPM29.2 dBA39.7 °C0.98
12.10 V5.017 V3.276 V521.75 W38.0 °C
50 %46.21 A6.20 A6.17 A607.43 W93.72 %797 RPM29.9 dBA39.6 °C0.99
12.04 V4.988 V3.276 V648.11 W37.8 °C
60 %55.66 A7.49 A7.48 A728.94 W93.18 %1062 RPM32.7 dBA40.9 °C0.99
11.99 V4.965 V3.261 V782.27 W37.9 °C
70 %65.10 A8.80 A8.79 A848.61 W92.48 %1248 RPM39.4 dBA40.4 °C0.99
11.93 V4.932 V3.250 V917.60 W37.4 °C
80 %75.58 A9.09 A9.17 A973.08 W91.80 %1488 RPM43.0 dBA42.6 °C0.99
11.89 V4.918 V3.242 V1060.04 W37.3 °C
90 %85.36 A10.27 A10.43 A1095.64 W90.83 %1627 RPM47.7 dBA44.4 °C0.99
11.85 V4.904 V3.237 V1206.23 W39.6 °C
100 %95.90 A11.46 A10.84 A1225.35 W90.22 %1819 RPM50.8 dBA42.6 °C0.99
11.83 V4.878 V3.224 V1358.18 W36.8 °C
110 %105.40 A12.51 A11.67 A1345.56 W89.89%1830 RPM51 dBA41.7 °C0.99
11.82 V4.864 V3.249 V1524.91 W35.1 °C

As for fan operation, in our case the fan started spinning when we reached the 40 % load mark. The higher ambient temperature might be to blame here. Overall the ramp up was quite steady with no sharp spikes in noise levels, but close to the full load the fan can definitely become audible. However, the temperatures overall were controlled very well. Of course, the high efficiency means that there's not that much heat to dissipate in the first place.




Voltage Regulation

Voltage regulation - Enermax PlatiGemini 1200 W
Test+12 V+5 V+3.3 V
5 %1.67 %1.74 %0.82 %
10 %1.58 %1.42 %0.55 %
20 %1.42 %0.92 %-0.12 %
30 %1.00 %0.72 %-0.36 %
40 %0.83 %0.34 %-0.73 %
50 %0.33 %-0.24 %-1.09 %
60 %-0.08 %-0.70 %-1.18 %
70 %-0.58 %-1.36 %-1.52 %
80 %-0.92 %-1.64 %-1.76 %
90 %-1.25 %-1.92 %-1.91 %
100%-1.42 %-2.44 %-2.30 %
110 %-1.75 %-2.72 %-2.67 %







The voltage regulation, while not great, is well within the ATX spec. The +12 V rail regulation is good with deviations below 2%, while the minor rails getting close to 2.5% at maximum load.

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 PlatiGemini 1200 W
Test12 V5 V3.3 V
5 %10 mV12 mV12 mV
10 %12 mV14 mV14 mV
20 %12 mV14 mV16 mV
30 %14 mV16 mV16 mV
40 %14 mV16 mV16 mV
50 %14 mV16 mV18 mV
60 %16 mV16 mV18 mV
70 %16 mV18 mV18 mV
80 %16 mV18 mV20 mV
90 %16 mV18 mV20 mV
100%16 mV18 mV22 mV
110 %16 mV18 mV22 mV

The ripple control on the Enermax PlatiGemini 1200 W is great and among the best we have seen so far.

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 connected to it.

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

SCP worked as expected with the unit.
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Dec 21st, 2024 20:39 EST change timezone

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