MSI MAG A850GLS PCIE5 ATX v3.1 PSU Review

Load Regulation

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 5.274A 1.99A 1.976A 1.011A 85.007 88.53% 413 <6.0 40.22°C 0.967
12.021V 5.024V 3.34V 4.944V 96.018 42.27°C 114.81V
20% 11.575A 2.989A 2.966A 1.216A 169.95 91.724% 414 <6.0 40.66°C 0.978
12.013V 5.019V 3.338V 4.936V 185.288 43.59°C 114.78V
30% 18.235A 3.489A 3.463A 1.42A 254.959 92.162% 416 <6.0 41.48°C 0.983
12.005V 5.016V 3.336V 4.929V 276.641 45.75°C 114.75V
40% 24.909A 3.991A 3.96A 1.626A 340.051 92.184% 417 <6.0 41.78°C 0.982
11.998V 5.012V 3.334V 4.921V 368.883 47.61°C 114.73V
50% 31.226A 4.993A 4.954A 1.832A 424.886 91.776% 419 <6.0 42.36°C 0.983
11.990V 5.007V 3.331V 4.912V 462.957 50.13°C 114.69V
60% 37.491A 5.998A 5.95A 2A 509.222 90.426% 636 8.4 42.96°C 0.987
11.992V 5.002V 3.328V 4.902V 563.134 52.72°C 114.67V
70% 43.862A 7.005A 6.95A 2.249A 594.77 89.824% 1100 27.2 43.32°C 0.989
11.984V 4.997V 3.324V 4.891V 662.15 53.2°C 114.63V
80% 50.243A 8.013A 7.949A 2.356A 679.578 89.135% 1384 34 43.6°C 0.99
11.975V 4.992V 3.321V 4.882V 762.415 53.93°C 114.6V
90% 57.032A 8.521A 8.432A 2.463A 765 88.398% 1832 42 44.64°C 0.991
11.967V 4.988V 3.321V 4.873V 865.402 54.7°C 114.56V
100% 63.565A 9.029A 8.95A 3.084A 849.825 87.532% 2151 46.3 45.06°C 0.992
11.958V 4.984V 3.318V 4.865V 970.874 54.88°C 114.53V
110% 69.979A 10.043A 10.048A 3.089A 934.411 86.639% 2269 47.5 46.05°C 0.993
11.949V 4.978V 3.314V 4.858V 1078.514 56.12°C 114.5V
CL1 0.117A 12.052A 11.915A 0A 101.305 85.668% 438 <6.0 42.01°C 0.972
12.026V 4.995V 3.332V 4.928V 118.254 59.68°C 114.79V
CL2 0.117A 20.031A 0A 0A 101.348 84.329% 435 <6.0 42.92°C 0.972
12.027V 4.99V 3.32V 4.932V 120.181 58.63°C 114.8V
CL3 0.115A 0A 19.735A 0A 67.389 80.593% 433 <6.0 42.32°C 0.965
12.027V 5.006V 3.344V 4.933V 83.615 56.56°C 114.81V
CL4 71.030A 0A 0A 0.001A 849.584 88.328% 1617 38.8 45.5°C 0.992
11.961V 5.009V 3.321V 4.883V 961.85 52.94°C 114.54V

Load regulation is within 1% on all primary 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 1.234A 0.497A 0.494A 0.2A 19.99 73.143% 405 <6.0 36.67°C 0.878
12.029V 5.03V 3.342V 4.951V 27.331 37.57°C 114.84V
40W 2.718A 0.696A 0.691A 0.303A 40.001 82.943% 408 <6.0 37.07°C 0.931
12.025V 5.028V 3.342V 4.949V 48.228 38.22°C 114.83V
60W 4.203A 0.895A 0.889A 0.404A 60.002 86.23% 410 <6.0 38.05°C 0.952
12.023V 5.027V 3.341V 4.947V 69.583 39.59°C 114.82V
80W 5.683A 1.094A 1.087A 0.506A 79.948 88.764% 412 <6.0 39.46°C 0.966
12.022V 5.026V 3.341V 4.946V 90.066 41.15°C 114.8V

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

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 19.4 mV 15.9 mV 16.8 mV 11.9 mV Pass
20% Load 21.3 mV 15.6 mV 15.7 mV 12.0 mV Pass
30% Load 22.8 mV 15.7 mV 17.1 mV 12.4 mV Pass
40% Load 23.9 mV 15.9 mV 17.5 mV 13.2 mV Pass
50% Load 26.9 mV 17.1 mV 19.3 mV 13.7 mV Pass
60% Load 26.3 mV 17.9 mV 19.0 mV 14.7 mV Pass
70% Load 26.2 mV 17.7 mV 19.4 mV 14.8 mV Pass
80% Load 26.5 mV 18.4 mV 20.6 mV 18.3 mV Pass
90% Load 28.3 mV 17.7 mV 22.0 mV 21.0 mV Pass
100% Load 39.4 mV 18.6 mV 21.9 mV 25.9 mV Pass
110% Load 40.6 mV 18.6 mV 25.0 mV 29.1 mV Pass
Crossload 1 26.2 mV 15.7 mV 17.6 mV 13.9 mV Pass
Crossload 2 20.8 mV 19.0 mV 16.3 mV 13.8 mV Pass
Crossload 3 18.6 mV 15.2 mV 17.4 mV 12.9 mV Pass
Crossload 4 40.7 mV 18.5 mV 21.6 mV 19.0 mV Pass

Ripple suppression could be a little better at 12V. It is satisfactory on the minor rails.

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