Micronics Wizmax G 1200W ATX v3.1 PSU Review

Load Regulation

It measures the stability of the output voltage when the load connected to the power supply varies.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 8.190A 1.996A 1.997A 0.985A 120.032 87.794% 0 <6.0 47.16°C 0.985
12.017V 5.012V 3.306V 5.077V 136.723 40.16°C 114.89V
20% 17.412A 2.996A 2.999A 1.186A 240.01 90.723% 0 <6.0 50.48°C 0.981
12.009V 5.009V 3.302V 5.06V 264.551 40.64°C 114.85V
30% 26.945A 3.497A 3.501A 1.388A 359.431 91.493% 0 <6.0 52.4°C 0.988
12.001V 5.007V 3.299V 5.044V 392.845 41.16°C 114.83V
40% 36.571A 4A 4.007A 1.592A 479.782 91.357% 826 23.5 41.96°C 0.992
11.993V 5.001V 3.295V 5.027V 525.174 45.37°C 114.81V
50% 45.813A 5.005A 5.015A 1.797A 599.54 91.042% 879 25.5 42.46°C 0.995
11.984V 4.997V 3.29V 5.009V 658.529 46.18°C 114.78V
60% 55.133A 6.01A 6.025A 2.001A 720.063 90.533% 977 28.6 42.75°C 0.996
11.976V 4.993V 3.287V 4.991V 795.362 47.22°C 114.76V
70% 64.401A 7.017A 7.037A 2.212A 839.826 89.856% 1110 32.1 43.07°C 0.997
11.967V 4.99V 3.283V 4.973V 934.642 48.92°C 114.73V
80% 73.746A 8.023A 8.05A 2.319A 959.828 89.073% 1253 35.6 43.76°C 0.997
11.959V 4.987V 3.28V 4.959V 1077.568 51.24°C 114.69V
90% 83.434A 8.529A 8.546A 2.427A 1079.65 88.258% 1371 38 44.23°C 0.998
11.951V 4.984V 3.276V 4.945V 1223.281 52.98°C 114.65V
100% 92.946A 9.036A 9.074A 3.054A 1199.693 87.314% 1503 40.1 45.56°C 0.998
11.942V 4.981V 3.273V 4.912V 1374.002 55.41°C 114.62V
110% 102.394A 10.046A 10.185A 3.062A 1320.321 86.192% 1628 42.1 46.17°C 0.998
11.934V 4.977V 3.269V 4.9V 1531.836 57.03°C 114.59V
CL1 0.117A 15.656A 15.651A 0A 131.31 80.894% 0 <6.0 57.71°C 0.986
12.021V 5.001V 3.297V 5.1V 162.322 40.28°C 114.92V
CL2 0.116A 25.003A 0A 0A 126.397 79.537% 0 <6.0 56.7°C 0.987
12.013V 4.999V 3.31V 5.106V 158.916 40.18°C 114.91V
CL3 0.116A 0A 25.045A 0A 83.893 72.92% 0 <6.0 54.06°C 0.981
12.025V 5.019V 3.294V 5.104V 115.052 40.24°C 114.92V
CL4 100.475A 0A 0A 0A 1200.167 87.889% 1498 40.1 45.51°C 0.998
11.945V 4.997V 3.285V 5.03V 1365.551 55.13°C 114.63V

Load regulation is within 1% at 12V and 5V, but this is not true for the 3.3V rail, where it is slightly higher than 1%, hence not as tight.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
20W 1.234A 0.499A 0.499A 0.196A 20.004 64.797% 0 <6.0 41.94°C 0.888
12.040V 5.015V 3.309V 5.114V 30.871 36.18°C 114.94V
40W 2.720A 0.698A 0.698A 0.294A 40.004 76.253% 0 <6.0 43.14°C 0.948
12.016V 5.015V 3.308V 5.109V 52.464 37.03°C 114.93V
60W 4.204A 0.898A 0.898A 0.392A 60.004 82.718% 0 <6.0 45.17°C 0.964
12.020V 5.015V 3.308V 5.104V 72.542 38.61°C 114.92V
80W 5.686A 1.097A 1.098A 0.491A 79.976 84.8% 0 <6.0 46.65°C 0.975
12.019V 5.015V 3.308V 5.098V 94.31 39.6°C 114.9V

A glance at the light loads table is always useful, as the PSU will typically operate at light loads.

Ripple Suppression

Ripple in power supplies refers to the small, unwanted AC voltage fluctuations superimposed on the DC output. It occurs due to imperfect filtering of the AC-to-DC conversion process. Lower ripple is highly preferable because it ensures a cleaner, more stable DC output, thereby reducing noise and potential interference in sensitive electronics, which improves performance and extends the lifespan of components. High ripple can cause instability, overheating, or damage to connected devices.

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 10.7 mV 6.1 mV 4.1 mV 6.7 mV Pass
20% Load 11.4 mV 6.5 mV 4.3 mV 8.1 mV Pass
30% Load 11.2 mV 6.6 mV 4.6 mV 7.8 mV Pass
40% Load 12.4 mV 6.9 mV 4.7 mV 8.3 mV Pass
50% Load 12.6 mV 7.2 mV 5.1 mV 8.4 mV Pass
60% Load 17.2 mV 9.1 mV 5.7 mV 10.0 mV Pass
70% Load 17.6 mV 9.5 mV 6.1 mV 10.9 mV Pass
80% Load 17.8 mV 8.7 mV 8.3 mV 11.1 mV Pass
90% Load 17.4 mV 8.9 mV 8.6 mV 11.4 mV Pass
100% Load 18.5 mV 9.3 mV 8.8 mV 13.0 mV Pass
110% Load 19.9 mV 9.5 mV 9.4 mV 13.5 mV Pass
Crossload 1 10.7 mV 6.6 mV 8.1 mV 6.2 mV Pass
Crossload 2 10.6 mV 6.7 mV 4.0 mV 6.4 mV Pass
Crossload 3 11.6 mV 7.8 mV 11.9 mV 6.6 mV Pass
Crossload 4 19.0 mV 8.9 mV 5.8 mV 9.5 mV Pass

Ripple suppression is good overall.

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