Lian Li SX0850P 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%	5.258A	1.992A	1.976A	0.977A	85.003	86.78%	0	<6.0	48.73°C	0.963
10%	12.057V	5.022V	3.339V	5.117V	97.954	86.78%	0	<6.0	40.47°C	114.97V
20%	11.536A	2.988A	2.964A	1.175A	169.962	91.04%	0	<6.0	51.32°C	0.992
20%	12.054V	5.022V	3.34V	5.108V	186.689	91.04%	0	<6.0	40.92°C	114.95V
30%	18.166A	3.486A	3.458A	1.373A	254.972	91.992%	724	18.8	41.40°C	0.991
30%	12.050V	5.022V	3.34V	5.099V	277.171	91.992%	724	18.8	48.99°C	114.92V
40%	24.806A	3.984A	3.953A	1.572A	340.06	92.329%	813	25.0	41.98°C	0.992
40%	12.047V	5.022V	3.339V	5.09V	368.31	92.329%	813	25.0	49.10°C	114.9V
50%	31.094A	4.979A	4.94A	1.772A	425.02	92.275%	955	24.8	42.47°C	0.993
50%	12.044V	5.022V	3.34V	5.08V	460.597	92.275%	955	24.8	49.15°C	114.89V
60%	37.349A	5.975A	5.926A	1.973A	509.553	92.028%	1074	28.2	42.89°C	0.994
60%	12.042V	5.022V	3.341V	5.07V	553.689	92.028%	1074	28.2	51.30°C	114.87V
70%	43.670A	6.971A	6.912A	2.174A	594.867	91.689%	1189	30.8	43.19°C	0.994
70%	12.039V	5.023V	3.342V	5.061V	648.787	91.689%	1189	30.8	52.46°C	114.84V
80%	49.998A	7.964A	7.895A	2.276A	679.697	91.11%	1401	34.9	43.85°C	0.994
80%	12.037V	5.023V	3.343V	5.054V	746.013	91.11%	1401	34.9	54.83°C	114.81V
90%	56.729A	8.462A	8.371A	2.378A	765.131	90.59%	1640	38.2	44.11°C	0.995
90%	12.033V	5.023V	3.344V	5.047V	844.608	90.59%	1640	38.2	51.53°C	114.79V
100%	63.200A	8.961A	8.905A	2.985A	849.963	89.975%	1738	40.1	45.10°C	0.995
100%	12.029V	5.022V	3.335V	5.025V	944.674	89.975%	1738	40.1	52.55°C	114.73V
110%	69.548A	9.958A	9.985A	2.988A	934.638	89.233%	1744	40.2	46.84°C	0.995
110%	12.026V	5.022V	3.335V	5.02V	1047.416	89.233%	1744	40.2	54.55°C	114.69V
CL1	0.117A	11.964A	11.848A	0A	101.317	84.088%	860	22.5	40.88°C	0.979
CL1	12.052V	5.032V	3.351V	5.136V	120.49	84.088%	860	22.5	44.23°C	114.92V
CL2	0.116A	19.835A	0A	0A	101.404	83.335%	747	20.1	40.82°C	0.978
CL2	12.055V	5.042V	3.339V	5.139V	121.682	83.335%	747	20.1	43.24°C	114.92V
CL3	0.116A	0A	19.595A	0A	67.399	77.550%	0	<6.0	43.87°C	0.96
CL3	12.052V	5.018V	3.368V	5.137V	86.912	77.550%	0	<6.0	40.18°C	114.94V
CL4	70.624A	0A	0A	0.001A	849.731	90.484%	1726	40.1	45.44°C	0.994
CL4	12.032V	5.013V	3.327V	5.11V	939.102	90.484%	1726	40.1	52.35°C	114.73V

Load regulation is tight on all 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	1.232A	0.498A	0.494A	0.195A	20.004	72.191%	0	<6.0	42.97°C	0.807
20W	12.060V	5.022V	3.337V	5.141V	27.708	72.191%	0	<6.0	36.82°C	114.98V
40W	2.711A	0.697A	0.692A	0.292A	40.002	79.031%	0	<6.0	44.15°C	0.915
40W	12.059V	5.022V	3.338V	5.138V	50.615	79.031%	0	<6.0	37.38°C	114.98V
60W	4.190A	0.896A	0.89A	0.39A	60	83.996%	0	<6.0	46.52°C	0.94
60W	12.058V	5.021V	3.338V	5.134V	71.433	83.996%	0	<6.0	38.62°C	114.98V
80W	5.667A	1.096A	1.087A	0.487A	79.96	86.722%	0	<6.0	45.74°C	0.96
80W	12.058V	5.021V	3.338V	5.131V	92.202	86.722%	0	<6.0	35.96°C	114.97V

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 during the AC-to-DC conversion. Lower ripple is highly preferable because it ensures a cleaner, more stable DC output, reducing noise and potential interference in sensitive electronics, improving performance, and extending component lifespan. High ripple can cause instability, overheating, or damage to connected devices.

Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	9.2 mV	8.7 mV	6.5 mV	8.4 mV	Pass
20% Load	10.8 mV	9.6 mV	7.0 mV	9.2 mV	Pass
30% Load	11.6 mV	14.8 mV	11.1 mV	9.5 mV	Pass
40% Load	12.5 mV	15.5 mV	11.8 mV	9.6 mV	Pass
50% Load	13.8 mV	21.7 mV	15.5 mV	10.9 mV	Pass
60% Load	16.0 mV	23.8 mV	20.6 mV	11.1 mV	Pass
70% Load	18.6 mV	23.4 mV	20.4 mV	11.7 mV	Pass
80% Load	20.1 mV	26.0 mV	29.5 mV	12.6 mV	Pass
90% Load	23.0 mV	27.9 mV	25.2 mV	13.0 mV	Pass
100% Load	27.8 mV	26.0 mV	23.9 mV	14.6 mV	Pass
110% Load	28.9 mV	30.1 mV	25.9 mV	15.1 mV	Pass
Crossload 1	13.1 mV	9.9 mV	10.3 mV	7.9 mV	Pass
Crossload 2	12.8 mV	13.9 mV	7.1 mV	7.5 mV	Pass
Crossload 3	13.7 mV	10.3 mV	12.6 mV	8.9 mV	Pass
Crossload 4	25.9 mV	31.4 mV	28.9 mV	15.3 mV	Pass