Segotep PM650W (SG-650P) 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%	3.560A	1.971A	1.957A	0.991A	64.992	86.161%	827	18.7	40.09°C	0.946
10%	12.187V	5.072V	3.372V	5.044V	75.432	86.161%	827	18.7	43.72°C	114.85V
20%	8.137A	2.966A	2.95A	1.198A	129.911	90.259%	843	19.2	40.94°C	0.978
20%	12.168V	5.058V	3.356V	5.008V	143.933	90.259%	843	19.2	45.86°C	114.82V
30%	13.075A	3.468A	3.456A	1.407A	194.909	91.408%	1097	26.9	41.3°C	0.988
30%	12.150V	5.046V	3.342V	4.973V	213.227	91.408%	1097	26.9	47.7°C	114.81V
40%	18.035A	3.974A	3.967A	1.62A	259.992	91.543%	1302	32.1	41.77°C	0.987
40%	12.131V	5.033V	3.327V	4.937V	284.011	91.543%	1302	32.1	49.92°C	114.78V
50%	22.665A	4.982A	4.984A	1.837A	324.985	91.347%	1407	34.4	42.43°C	0.988
50%	12.111V	5.018V	3.311V	4.899V	355.771	91.347%	1407	34.4	50.67°C	114.76V
60%	27.253A	5.997A	6.011A	2A	389.037	90.882%	1492	35.9	42.82°C	0.991
60%	12.090V	5.004V	3.294V	4.869V	428.067	90.882%	1492	35.9	52.55°C	114.74V
70%	31.941A	7.016A	7.049A	2.28A	454.609	90.372%	1506	36.4	43.28°C	0.994
70%	12.069V	4.989V	3.277V	4.825V	503.044	90.372%	1506	36.4	55.09°C	114.71V
80%	36.643A	8.039A	8.096A	2.397A	519.402	89.357%	1507	36.4	43.77°C	0.995
80%	12.049V	4.975V	3.26V	4.798V	581.27	89.357%	1507	36.4	58.05°C	114.69V
90%	41.756A	8.562A	8.626A	2.515A	584.818	88.778%	1509	36.5	44.09°C	0.997
90%	12.030V	4.963V	3.246V	4.771V	658.741	88.778%	1509	36.5	61.23°C	114.66V
100%	46.821A	9.09A	9.192A	2.634A	649.548	88.196%	1511	36.6	45.93°C	0.997
100%	12.010V	4.95V	3.231V	4.745V	736.487	88.196%	1511	36.6	62.7°C	114.64V
110%	51.644A	10.132A	10.362A	2.645A	714.953	87.486%	1513	36.7	46.82°C	0.998
110%	11.989V	4.934V	3.213V	4.727V	817.21	87.486%	1513	36.7	62.84°C	114.62V
CL1	0.114A	12.319A	12.287A	0A	104.279	84.557%	1387	33.9	41.49°C	0.973
CL1	12.152V	5.032V	3.328V	5.102V	123.324	84.557%	1387	33.9	47.91°C	114.83V
CL2	0.113A	14.853A	0A	0A	76.381	83.946%	1050	25.8	40.02°C	0.956
CL2	12.177V	5.049V	3.361V	5.127V	90.989	83.946%	1050	25.8	45.19°C	114.84V
CL3	0.113A	0A	15.786A	0A	54.177	78.494%	1006	24.2	41.22°C	0.935
CL3	12.172V	5.061V	3.344V	5.121V	69.023	78.494%	1006	24.2	45.8°C	114.85V
CL4	53.928A	0A	0A	0A	649.504	89.206%	1512	36.6	45.18°C	0.997
CL4	12.044V	4.99V	3.27V	5.033V	728.089	89.206%	1512	36.6	61.85°C	114.65V

Load regulation is loose on all rails, especially at 5VSB, where voltage drops below the 4.75V limit.

Test	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed (RPM)	PSU Noise (dB[A])	Temps (In/Out)	PF/AC Volts
20W	1.216A	0.492A	0.487A	0.195A	19.988	71.508%	811	18.1	36.27°C	0.774
20W	12.202V	5.081V	3.386V	5.135V	27.954	71.508%	811	18.1	37.35°C	114.88V
40W	2.680A	0.689A	0.683A	0.293A	39.989	82.161%	818	18.5	37.07°C	0.892
40W	12.197V	5.079V	3.382V	5.121V	48.672	82.161%	818	18.5	39.13°C	114.86V
60W	4.144A	0.886A	0.879A	0.391A	59.99	86.359%	822	18.6	38.48°C	0.936
60W	12.192V	5.076V	3.377V	5.107V	69.466	86.359%	822	18.6	40.9°C	114.86V
80W	5.604A	1.084A	1.076A	0.491A	79.922	88.453%	826	18.7	39.45°C	0.956
80W	12.186V	5.073V	3.373V	5.093V	90.356	88.453%	826	18.7	42.83°C	114.84V

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	10.8 mV	8.7 mV	9.5 mV	6.9 mV	Pass
20% Load	14.4 mV	8.5 mV	10.2 mV	7.1 mV	Pass
30% Load	14.6 mV	9.1 mV	11.3 mV	7.7 mV	Pass
40% Load	15.0 mV	9.5 mV	10.9 mV	7.7 mV	Pass
50% Load	15.9 mV	9.5 mV	11.4 mV	8.3 mV	Pass
60% Load	16.8 mV	9.6 mV	11.8 mV	9.0 mV	Pass
70% Load	17.4 mV	10.2 mV	13.1 mV	10.0 mV	Pass
80% Load	16.3 mV	11.0 mV	14.1 mV	11.0 mV	Pass
90% Load	17.2 mV	11.6 mV	14.8 mV	10.8 mV	Pass
100% Load	28.8 mV	12.8 mV	16.3 mV	12.0 mV	Pass
110% Load	28.6 mV	13.9 mV	16.9 mV	13.9 mV	Pass
Crossload 1	23.1 mV	12.2 mV	14.8 mV	15.7 mV	Pass
Crossload 2	12.8 mV	9.6 mV	9.9 mV	12.2 mV	Pass
Crossload 3	11.7 mV	8.8 mV	12.5 mV	14.7 mV	Pass
Crossload 4	26.3 mV	11.5 mV	12.9 mV	14.8 mV	Pass