Micronics Wizmax G 850W 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% 5.230A 1.997A 2.002A 0.987A 85.005 86.618% 0 <6.0 48.21°C 0.98
12.123V 5.008V 3.296V 5.067V 98.138 40.3°C 114.92V
20% 11.480A 2.997A 3.005A 1.188A 169.97 90.616% 0 <6.0 49.91°C 0.979
12.113V 5.006V 3.294V 5.053V 187.571 40.87°C 114.9V
30% 18.083A 3.497A 3.508A 1.39A 254.98 91.677% 0 <6.0 50.59°C 0.986
12.106V 5.005V 3.293V 5.038V 278.129 41.06°C 114.88V
40% 24.708A 3.999A 4.012A 1.593A 340.074 91.728% 731 19.2 41.76°C 0.99
12.096V 5.003V 3.291V 5.023V 370.743 45.92°C 114.85V
50% 30.994A 5.001A 5.019A 1.798A 425.075 91.555% 778 21.3 42.48°C 0.993
12.085V 5V 3.288V 5.008V 464.281 46.53°C 114.83V
60% 37.246A 6.004A 6.027A 2.001A 509.602 91.022% 866 25.0 42.82°C 0.995
12.076V 4.998V 3.286V 4.992V 559.864 47.56°C 114.81V
70% 43.570A 7.008A 7.036A 2.211A 594.952 90.299% 986 28.8 43.09°C 0.996
12.069V 4.996V 3.284V 4.976V 658.873 48.15°C 114.79V
80% 49.905A 8.01A 8.044A 2.317A 679.785 89.529% 1111 32.1 43.58°C 0.996
12.061V 4.994V 3.282V 4.963V 759.295 49.34°C 114.76V
90% 56.628A 8.513A 8.536A 2.424A 765.22 88.72% 1248 35.4 44.78°C 0.997
12.056V 4.993V 3.28V 4.951V 862.515 51.28°C 114.74V
100% 63.105A 9.017A 9.059A 3.048A 850.022 87.811% 1354 37.6 45.49°C 0.997
12.049V 4.991V 3.278V 4.922V 968.011 52.39°C 114.72V
110% 69.451A 10.021A 10.163A 3.055A 934.602 86.78% 1490 40.1 46.51°C 0.997
12.042V 4.99V 3.276V 4.911V 1076.981 54.67°C 114.7V
CL1 0.115A 15.669A 15.69A 0A 131.305 82.725% 0 <6.0 50.53°C 0.98
12.138V 4.997V 3.288V 5.08V 158.725 40.06°C 114.91V
CL2 0.115A 25.039A 0A 0A 126.391 80.726% 0 <6.0 50.77°C 0.979
12.138V 4.992V 3.3V 5.087V 156.569 41.07°C 114.91V
CL3 0.115A 0A 25.12A 0A 83.892 74.516% 0 <6.0 50.01°C 0.982
12.143V 5.012V 3.284V 5.085V 112.582 40.81°C 114.93V
CL4 70.480A 0A 0A 0.001A 849.697 88.517% 1353 37.6 45.95°C 0.997
12.056V 5.007V 3.289V 5.032V 959.933 52.81°C 114.73V

Load regulation is within 1% on all main rails.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
20W 1.226A 0.499A 0.5A 0.196A 20.006 68.711% 0 <6.0 43.64°C 0.892
12.122V 5.01V 3.298V 5.099V 29.116 36.87°C 114.95V
40W 2.698A 0.699A 0.7A 0.295A 40.004 79.789% 0 <6.0 44.46°C 0.945
12.121V 5.01V 3.298V 5.094V 50.138 37.42°C 114.94V
60W 4.169A 0.898A 0.901A 0.393A 60.003 84.253% 0 <6.0 45.67°C 0.966
12.121V 5.01V 3.298V 5.089V 71.217 38.33°C 114.93V
80W 5.638A 1.098A 1.101A 0.492A 79.966 86.732% 0 <6.0 47.21°C 0.978
12.120V 5.01V 3.298V 5.084V 92.201 39.39°C 114.93V

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 11.6 mV 6.9 mV 4.9 mV 7.8 mV Pass
20% Load 11.4 mV 7.1 mV 5.2 mV 10.2 mV Pass
30% Load 12.6 mV 7.7 mV 5.7 mV 9.5 mV Pass
40% Load 13.4 mV 8.3 mV 5.2 mV 10.3 mV Pass
50% Load 13.7 mV 8.0 mV 5.5 mV 11.0 mV Pass
60% Load 15.5 mV 8.2 mV 5.5 mV 11.3 mV Pass
70% Load 16.2 mV 8.5 mV 5.5 mV 13.5 mV Pass
80% Load 18.6 mV 8.7 mV 8.2 mV 13.6 mV Pass
90% Load 19.2 mV 9.1 mV 8.9 mV 13.8 mV Pass
100% Load 24.1 mV 11.0 mV 9.8 mV 16.7 mV Pass
110% Load 25.7 mV 10.6 mV 9.8 mV 18.1 mV Pass
Crossload 1 16.2 mV 8.4 mV 10.2 mV 8.6 mV Pass
Crossload 2 12.1 mV 7.9 mV 4.7 mV 7.7 mV Pass
Crossload 3 11.4 mV 7.2 mV 10.5 mV 7.6 mV Pass
Crossload 4 24.6 mV 9.7 mV 6.3 mV 12.7 mV Pass

Ripple suppression is good overall.

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