PCCooler YT850 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% 5.226A 1.964A 1.94A 0.989A 85.008 85.082% 0 <6.0 48.75°C 0.968
12.132V 5.093V 3.403V 5.057V 99.913 40.01°C 114.91V
20% 11.466A 2.947A 2.911A 1.19A 169.982 90.411% 0 <6.0 49.9°C 0.981
12.129V 5.092V 3.401V 5.043V 188.008 40.57°C 114.89V
30% 18.085A 3.438A 3.397A 1.392A 254.997 91.901% 0 <6.0 50.78°C 0.986
12.105V 5.092V 3.4V 5.03V 277.467 41.05°C 114.87V
40% 24.695A 3.929A 3.883A 1.595A 340.095 92.076% 0 <6.0 56.23°C 0.986
12.102V 5.092V 3.4V 5.017V 369.361 41.85°C 114.84V
50% 30.957A 4.911A 4.855A 1.799A 425.122 91.822% 0 <6.0 57.21°C 0.987
12.101V 5.092V 3.399V 5.003V 462.982 42.23°C 114.82V
60% 37.188A 5.9A 5.833A 2.001A 509.644 91.282% 873 25.7 42.68°C 0.986
12.097V 5.087V 3.395V 4.989V 558.318 64.8°C 114.8V
70% 43.491A 6.889A 6.812A 2.212A 594.993 90.826% 872 25.7 43.09°C 0.986
12.092V 5.083V 3.392V 4.975V 655.087 65.59°C 114.78V
80% 49.791A 7.874A 7.788A 2.317A 679.82 90.331% 868 25.6 43.6°C 0.987
12.089V 5.08V 3.39V 4.965V 752.593 68.33°C 114.75V
90% 56.479A 8.368A 8.262A 2.423A 765.253 89.733% 863 25.4 44.04°C 0.988
12.088V 5.08V 3.389V 4.954V 852.809 72.35°C 114.72V
100% 62.915A 8.861A 8.767A 3.045A 850.036 88.965% 1448 40.2 45.82°C 0.989
12.085V 5.079V 3.388V 4.927V 955.473 70.23°C 114.7V
110% 69.223A 9.852A 9.84A 3.05A 934.628 88.33% 1450 40.2 46.58°C 0.989
12.082V 5.076V 3.384V 4.919V 1058.114 72.14°C 114.66V
CL1 0.116A 13.02A 12.857A 0A 111.312 82.778% 874 25.7 41.43°C 0.977
12.145V 5.085V 3.399V 5.078V 134.473 58.68°C 114.9V
CL2 0.115A 19.707A 0A 0A 101.403 80.714% 1453 40.3 40.03°C 0.974
12.139V 5.074V 3.405V 5.084V 125.631 50.91°C 114.9V
CL3 0.115A 0A 19.455A 0A 67.396 74.435% 1452 40.3 39.76°C 0.963
12.133V 5.096V 3.392V 5.082V 90.542 47.9°C 114.91V
CL4 70.354A 0A 0A 0.001A 849.882 89.586% 1445 40.1 45.21°C 0.988
12.080V 5.088V 3.393V 5.041V 948.676 65.25°C 114.69V

Load regulation is within 1% on all primary rails, so all is good here.

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 0.491A 0.485A 0.196A 20.009 75.594% 0 <6.0 43.52°C 0.782
12.037V 5.091V 3.402V 5.089V 26.47 36.6°C 114.94V
40W 2.716A 0.688A 0.679A 0.295A 40.006 82.505% 0 <6.0 46.11°C 0.909
12.040V 5.091V 3.402V 5.085V 48.488 37.27°C 114.93V
60W 4.166A 0.884A 0.873A 0.394A 60.005 81.929% 0 <6.0 47.01°C 0.951
12.129V 5.092V 3.403V 5.08V 73.242 38.46°C 114.92V
80W 5.634A 1.08A 1.067A 0.493A 79.975 85.121% 0 <6.0 48.07°C 0.965
12.131V 5.094V 3.404V 5.075V 93.954 39.27°C 114.92V

A glance at the light-load table is always useful, as the PSU typically operates 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 14.3 mV 14.6 mV 10.5 mV 19.9 mV Pass
20% Load 16.2 mV 15.3 mV 11.7 mV 20.9 mV Pass
30% Load 17.3 mV 16.8 mV 13.1 mV 22.3 mV Pass
40% Load 17.0 mV 19.9 mV 16.1 mV 22.6 mV Pass
50% Load 16.8 mV 18.4 mV 13.9 mV 23.6 mV Pass
60% Load 13.0 mV 10.3 mV 8.9 mV 16.3 mV Pass
70% Load 13.3 mV 11.4 mV 9.4 mV 17.0 mV Pass
80% Load 13.3 mV 11.5 mV 13.4 mV 19.4 mV Pass
90% Load 13.8 mV 11.1 mV 14.6 mV 18.9 mV Pass
100% Load 15.8 mV 13.6 mV 15.8 mV 21.4 mV Pass
110% Load 18.2 mV 13.4 mV 16.8 mV 21.0 mV Pass
Crossload 1 12.1 mV 10.1 mV 11.9 mV 12.8 mV Pass
Crossload 2 11.3 mV 8.9 mV 6.3 mV 10.3 mV Pass
Crossload 3 9.3 mV 8.8 mV 13.4 mV 10.7 mV Pass
Crossload 4 16.8 mV 11.7 mV 11.6 mV 15.8 mV Pass

Ripple suppression is good overall.

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