CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Montech Gamma II 750W
Serial NumberGAMMA750200500177
Lab IDMT75001695
  • Report: 20PS1695A
  • Receipt Date: Jul 22, 2020
  • Test Date: Jul 29, 2020
  • Report Date: Jul 3, 2020
115V230V
Efficiency Rating
115V230V
Noise Rating
Aristeidis Bitziopoulos, Laboratory General Manager

General Information

DUT Information

BrandMontech
Manufacturer (OEM)Channel Well Technology
SeriesGamma II
Model NumberGPS750S-G
Serial NumberGAMMA750200500177
DUT Notes

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)10
Rated Frequency (Hz)47-63
Rated Power (W)750
TypeATX12V
Cooling120mm Sleeve Bearing Fan
(D12SM-12)
Semi-Passive Operation✗
Cable DesignFixed cables

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps2222622.50.3
Watts12074412.53.6
Total Max. Power (W)750

Test Equipment

Electronic Loads Chroma 63601-5 x4
Chroma 63600-2 x2
63640-80-80 x20
63610-80-20 x2
AC Sources Chroma 6530, Keysight AC6804B
Power Analyzers N4L PPA1530 x2
Sound Analyzer Bruel & Kjaer 2270 G4
Microphone Bruel & Kjaer Type 4955-A
Data Loggers Picoscope TC-08 x2, Labjack U3-HV x2
Tachometer UNI-T UT372 x2
Digital Multimeter Keysight U1273AX, Fluke 289, Keithley 2015 - THD
UPS CyberPower OLS3000E 3kVA x2
Transformer 3kVA x2
Testing Methodology Cybenetics PSU Test Protocol

Cables and Connectors

Native Cables
Description Cable Count Connector Count (Total) Gauge In Cable Caps
ATX connector 20+4 pin (500mm) 1 1 18AWG No
8 pin EPS12V (560mm) / 4+4 pin EPS12V (+150mm) 1 1 / 1 18AWG No
6+2 pin PCIe (470mm+150mm) 2 4 18AWG No
SATA (450mm+150mm+150mm+150mm) 2 8 20AWG No
4-pin Molex (450mm+150mm+150mm) / FDD (+150mm) 1 3 / 1 20AWG No
Modular Cables
AC Power Cord (1400mm) - C13 coupler 1 1 16AWG -

Parts Description

General Data -
Manufacturer (OEM) CWT
Platform GPS
PCB Type Single Sided
Primary Side -
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CAP004DG Discharge IC
Inrush Protection NTC Thermistor SCK-085 & Relay
Bridge Rectifier(s) 1x  GBU15L06 (800V, 10A @ 100°C)
APFC MOSFETs 2x Great Power GP28S50G (500V, 28A @ 150°C, Rds(on): 0.125Ohm)
APFC Boost Diode 1x On Semiconductor FFSP0865A (650V, 8A @ 155°C)
Bulk Cap(s) 1x Nippon Chemi-Con (400V, 470uF, 2,000h @ 105°C, KMW)
Main Switchers 2x On Semiconductor FCPF125N65S3 (650V, 15A @ 100°C, Rds(on): 0.125Ohm)
APFC Controller Champion CM6502S & CM03X Phantom Power Remover
Resonant Controller Champion CM6901X
Topology Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side -
+12V MOSFETs 6x SG40N01D
5V & 3.3V DC-DC Converters: 4x UBIQ QM3006D (30V, 57A @ 100°C, Rds(on): 5.5mOhm)
PWM Controllers: ANPEC APW7159C
Filtering Capacitors Electrolytic: 10x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 1x Nichicon (4-10,000h @ 105°C, HE)
Polymer: 12x APAQ
Supervisor IC Sitronix ST9S313-DAG (OVP, UVP, SCP)
Fan Model Yate Loon D12SM-12 (120mm, 12V, 0.30A, Rifle Bearing Fan)
5VSB Circuit -
Rectifier 1x PFC PFS5V45 SBR(45V, 5A)
Standby PWM Controller Power Integrations TNY177PN

Test Results

Temperature & Compliance Info

Temperature Range (°C /°F)30-32 / 86-89.6
ErP Lot 3/6 Ready✓
(EU) No 617/2013 Compliance✓

Performance Summary

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)9
AC Loss to PWR_OK Hold Up Time (ms)10.8
PWR_OK Inactive to DC Loss Delay (ms)-1.8

Vampire Power

Graphs

INFO

This graph is generated by the PPA Standby Power Analysis software which takes full control of the power analyzer during the whole procedure. This application features all of the EN50564 & IEC62301 test limits for standby power software testing

INFO

This graph is generated by the PPA Standby Power Analysis software which takes full control of the power analyzer during the whole procedure. This application features all of the EN50564 & IEC62301 test limits for standby power software testing

Efficiency Graph

INFO

This graph depicts the PSU`s efficiency throughout its entire operational range. For the generation of the efficiency and noise graphs we set our loaders to auto mode through our custom-made software before trying thousands of possible load combinations

INFO

This graph depicts the PSU`s efficiency throughout its entire operational range. For the generation of the efficiency and noise graphs we set our loaders to auto mode through our custom-made software before trying thousands of possible load combinations

Noise Graph

INFO

The PSU`s noise in its entire operational range and under 30-32 °C ambient is depicted in this graph. The X axis represents the load on the +12V rail(s) while the Y axis is the load on the minor rails

INFO

The PSU`s noise in its entire operational range and under 30-32 °C ambient is depicted in this graph. The X axis represents the load on the +12V rail(s) while the Y axis is the load on the minor rails

Indicative Performance

Efficiency under high ambient temperature

INFO

The PSU`s efficiency under high ambient temperatures with 115V and 230V input. For this graph the results of the 10-110% load regulation table are used

5VSB Efficiency

INFO

This graph depicts the efficiency levels of the 5VSB rail with 115V and 230V input

5VSB Efficiency (ERP LOT 3/6 & CEC)

Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.230 59.740% 0.036
5.103V 0.385 115.13V
2 0.090A 0.459 68.610% 0.061
5.102V 0.669 115.13V
3 0.550A 2.801 77.354% 0.264
5.092V 3.621 115.13V
4 1.000A 5.083 76.104% 0.370
5.082V 6.679 115.13V
5 1.500A 7.611 76.194% 0.430
5.074V 9.989 115.13V
6 2.500A 12.631 74.357% 0.478
5.052V 16.987 115.12V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.230 55.156% 0.012
5.102V 0.417 230.29V
2 0.090A 0.459 64.557% 0.020
5.101V 0.711 230.29V
3 0.550A 2.802 76.245% 0.100
5.092V 3.675 230.29V
4 1.000A 5.084 76.740% 0.169
5.083V 6.625 230.30V
5 1.500A 7.610 77.063% 0.229
5.072V 9.875 230.30V
6 2.501A 12.632 76.865% 0.311
5.051V 16.434 230.30V

Supplementary Tests (For Reference)

Typical Load Tests

Test # 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
1 4.406A 1.982A 1.954A 0.986A 74.968 85.955% 833 22.5 40.41°C 0.964
12.112V 5.047V 3.378V 5.071V 87.218 45.24°C 115.13V
2 9.844A 2.980A 2.943A 1.186A 150.036 89.833% 832 22.4 40.76°C 0.984
12.102V 5.034V 3.364V 5.060V 167.017 46.15°C 115.13V
3 15.628A 3.484A 3.444A 1.387A 225.044 90.885% 834 22.5 41.10°C 0.988
12.093V 5.024V 3.353V 5.049V 247.614 47.23°C 115.12V
4 21.425A 3.990A 3.950A 1.588A 300.063 90.916% 837 22.6 41.83°C 0.990
12.082V 5.014V 3.342V 5.038V 330.044 48.79°C 115.12V
5 26.854A 5.000A 4.961A 1.791A 374.672 90.522% 838 22.7 42.35°C 0.989
12.071V 5.001V 3.328V 5.026V 413.900 49.86°C 115.12V
6 32.320A 6.016A 5.977A 1.995A 449.621 89.852% 892 24.6 42.57°C 0.989
12.061V 4.988V 3.313V 5.013V 500.404 50.89°C 115.12V
7 37.822A 7.036A 7.004A 2.201A 524.910 89.102% 1151 30.8 43.05°C 0.989
12.051V 4.975V 3.299V 5.001V 589.109 52.13°C 115.12V
8 43.348A 8.003A 8.043A 2.407A 599.936 87.447% 1836 42.7 43.52°C 0.988
12.038V 4.961V 3.283V 4.988V 686.057 53.12°C 115.12V
9 49.235A 8.589A 8.559A 2.411A 674.774 86.707% 2121 46.5 44.65°C 0.989
12.029V 4.950V 3.272V 4.980V 778.224 54.55°C 115.11V
10 55.131A 9.114A 9.113A 2.516A 749.902 85.877% 2117 46.5 45.69°C 0.990
12.020V 4.939V 3.260V 4.970V 873.229 55.89°C 115.11V
11 61.440A 9.132A 9.138A 2.520A 825.139 84.858% 2117 46.5 47.01°C 0.991
12.010V 4.931V 3.251V 4.963V 972.377 57.73°C 115.11V
CL1 0.100A 14.005A 14.000A 0.000A 116.943 83.571% 832 22.4 42.27°C 0.981
12.090V 4.973V 3.292V 5.071V 139.932 49.52°C 115.14V
CL2 62.018A 1.000A 1.002A 1.000A 759.334 86.504% 2116 46.5 45.56°C 0.990
12.029V 4.985V 3.315V 5.012V 877.807 55.20°C 115.11V

The results above are not used in the certification process

Test # 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
1 4.410A 1.982A 1.954A 0.986A 74.975 85.094% 844 22.8 40.20°C 0.810
12.102V 5.046V 3.378V 5.070V 88.108 44.27°C 230.27V
2 9.851A 2.980A 2.944A 1.186A 150.060 89.637% 843 22.8 40.26°C 0.914
12.096V 5.033V 3.364V 5.059V 167.408 45.06°C 230.27V
3 15.632A 3.484A 3.445A 1.387A 225.074 91.436% 842 22.8 41.44°C 0.943
12.092V 5.023V 3.353V 5.048V 246.154 47.25°C 230.28V
4 21.429A 3.990A 3.951A 1.589A 300.092 91.945% 835 22.6 41.50°C 0.958
12.081V 5.013V 3.342V 5.036V 326.383 48.17°C 230.28V
5 26.863A 5.000A 4.961A 1.792A 374.754 91.900% 851 22.7 42.14°C 0.965
12.070V 5.001V 3.328V 5.024V 407.783 49.43°C 230.28V
6 32.331A 6.017A 5.980A 1.996A 449.700 92.198% 880 24.1 42.52°C 0.973
12.059V 4.987V 3.313V 5.011V 487.756 50.49°C 230.28V
7 37.837A 7.041A 7.006A 2.201A 525.015 91.635% 1259 33.5 43.61°C 0.976
12.049V 4.973V 3.297V 4.999V 572.939 52.21°C 230.27V
8 43.351A 8.004A 8.044A 2.408A 600.009 90.439% 1897 44.0 43.98°C 0.974
12.039V 4.960V 3.282V 4.986V 663.440 53.02°C 230.28V
9 49.236A 8.592A 8.561A 2.411A 674.839 89.984% 2128 46.5 44.37°C 0.975
12.030V 4.949V 3.271V 4.979V 749.956 54.13°C 230.28V
10 55.140A 9.120A 9.117A 2.517A 749.973 89.459% 2127 46.5 45.87°C 0.977
12.019V 4.938V 3.258V 4.969V 838.344 56.01°C 230.27V
11 61.457A 9.134A 9.142A 2.521A 825.206 88.872% 2128 46.5 46.54°C 0.978
12.008V 4.929V 3.249V 4.961V 928.532 57.42°C 230.27V
CL1 0.101A 14.006A 14.001A 0.000A 116.936 83.216% 846 22.8 41.78°C 0.894
12.082V 4.972V 3.291V 5.069V 140.521 49.24°C 230.28V
CL2 62.025A 1.000A 1.001A 1.000A 759.350 90.180% 2126 46.5 45.43°C 0.977
12.028V 4.985V 3.314V 5.011V 842.038 56.09°C 230.28V

The results above are not used in the certification process

Light Load Tests

Test # 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) PF/AC Volts
1 1.225A 0.494A 0.488A 0.196A 19.996 67.664% 834 22.5 0.821
12.115V 5.062V 3.395V 5.096V 29.552 115.13V
2 2.450A 0.987A 0.974A 0.393A 39.985 80.294% 835 22.6 0.919
12.120V 5.056V 3.389V 5.089V 49.798 115.13V
3 3.678A 1.486A 1.462A 0.590A 60.017 84.330% 832 22.4 0.954
12.117V 5.051V 3.383V 5.083V 71.169 115.13V
4 4.901A 1.982A 1.954A 0.788A 79.968 86.794% 831 22.3 0.967
12.113V 5.046V 3.378V 5.076V 92.135 115.13V

The results above are not used in the certification process

Test # 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) PF/AC Volts
1 1.226A 0.494A 0.485A 0.196A 20.001 59.628% 840 22.7 0.500
12.117V 5.062V 3.395V 5.094V 33.543 230.28V
2 2.452A 0.988A 0.974A 0.393A 39.992 77.709% 839 22.7 0.652
12.111V 5.056V 3.389V 5.088V 51.464 230.27V
3 3.682A 1.485A 1.462A 0.591A 60.023 83.670% 841 22.7 0.757
12.106V 5.051V 3.383V 5.081V 71.738 230.28V
4 4.906A 1.982A 1.953A 0.789A 79.974 85.840% 843 22.8 0.823
12.102V 5.046V 3.378V 5.073V 93.166 230.27V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load15.40mV18.90mV10.70mV14.90mVPass
20% Load19.40mV20.20mV11.50mV16.20mVPass
30% Load19.80mV20.40mV12.20mV14.90mVPass
40% Load21.90mV25.60mV20.00mV15.00mVPass
50% Load23.40mV27.60mV22.80mV15.70mVPass
60% Load28.80mV26.60mV24.30mV23.00mVPass
70% Load34.20mV25.10mV16.90mV18.50mVPass
80% Load28.90mV27.20mV19.40mV17.90mVPass
90% Load32.20mV32.10mV29.90mV18.00mVPass
100% Load43.90mV34.60mV34.40mV21.80mVPass
110% Load45.80mV35.70mV38.10mV22.90mVPass
Crossload132.10mV21.80mV15.90mV11.70mVPass
Crossload240.40mV32.90mV35.20mV18.80mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load11.20mV21.70mV13.40mV13.90mVPass
20% Load34.10mV21.40mV14.70mV14.00mVPass
30% Load28.90mV21.40mV12.70mV15.00mVPass
40% Load23.90mV23.20mV13.40mV15.60mVPass
50% Load24.30mV24.50mV14.30mV16.10mVPass
60% Load26.70mV25.50mV22.50mV19.50mVPass
70% Load33.50mV23.40mV19.20mV20.40mVPass
80% Load27.70mV28.20mV20.40mV17.30mVPass
90% Load29.50mV28.70mV28.80mV17.50mVPass
100% Load43.70mV33.60mV33.90mV21.50mVPass
110% Load44.80mV35.60mV34.70mV21.90mVPass
Crossload118.70mV21.40mV16.20mV11.70mVPass
Crossload240.30mV32.80mV33.80mV19.60mVPass

The results above are not used in the certification process

Montech Gamma II 750W

Top side
Power specifications label
All data and graphs included in this test report can be used by any individual on the following conditions:
› It should be mentioned that the test results are provided by Cybenetics
› The link to the original test results document should be provided in any case
Cybenetics offers the ETA and Lambda voluntary certification programs, through which the efficient and silent power supplies are promoted
CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
www.cybenetics.com - info@cybenetics.com