CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Version:00
Montech Century II Gold 850 ATX3
Serial Number-
Lab IDMT85002813
Certification ID252813
  • Test Result Report ID: 25PS2813A
  • Certificate Issue Date: May 13, 2025
115V230V
Scheme: ETA-EMI PSU
115V230V
Scheme: LAMBDA PSU
Aristeidis Bitziopoulos, Certification Body General Manager

General Information

DUT Information

BrandMontech
Manufacturer (OEM)Shenzhen Xinweiye Technology Co., Ltd
SeriesCentury II
Model Number
Serial Number-
DUT Notes

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)10
Rated Frequency (Hz)50-60
Rated Power (W)850
TypeATX12V
Dimensions (W x H x D)
Cooling135mm Rifle Bearing Fan (HA13525M12SF-Z)
Semi-Passive Operation✓ (selectable)
Cable DesignFully Modular

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202070.830.3
Watts100849.6153.6
Total Max. Power (W)850

Test Equipment

Electronic Loads

Chroma 63601-5 x2
Chroma 63600-2
63640-80-80 x10
63610-80-20
AC Sources Chroma 6530, APM SP300VAC4000W-P
Power Analyzers RS HMC8015
Oscilloscopes Picoscope 4444, Siglent SDS2104X PLUS
Sound Analyzer Bruel & Kjaer 2270 G4
Microphone Bruel & Kjaer Type 4955-A
Temperature Logger Picoscope TC-08
Tachometer UNI-T UT372
Multimeters Keysight 34465A
UPS FSP Champ Tower 3kVA, CyberPower OLS3000E 3kVA
Isolation Transformer 4kVA
Testing Methodology Cybenetics PSU Test Protocol

Cables and Connectors

Modular Cables
Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (590mm) 1 1 18AWG No
4+4 pin EPS12V (700mm) 2 2 18AWG No
6+2 pin PCIe (600mm+150mm) 2 4 18AWG No
12+4 pin PCIe (600mm) (600W) 1 1 16-26AWG No
SATA (500mm+150mm+150mm+150mm) 2 8 18AWG No
4-pin Molex (500mm+150mm+150mm+150mm) 1 4 18AWG No
AC Power Cord (1350mm) - C13 coupler 1 1 18AWG -

Test Results

Temperature & Compliance Info

Temperature Range (°C /°F)30-32 / 86-89.6
ErP Lot 3/6 Ready✓
(EU) No 617/2013 Compliance✓
ALPM (Alternative Low Power Mode) compatible✓
ATX v3.1 PSU Power Excursion✓

Performance Summary

Efficiency RatingPLATINUM
Noise RatingA-
Average Efficiency (>1450 load combinations)89.800%
Average Noise Output (>1450 Load Combinations)26.89dBA
Average PF (>1450 Load Combinations)0.985
Efficiency With 10W (≤500W) or 2% (>500W) Load70.357%
Standby Power Consumption0.0730W
12V Ripple (Full Load)28.25mV
5V Ripple (Full Load)22.96mV
3.3V Ripple (Full Load)20.83mV
5VSB Ripple (Full Load)17.02mV
12V Load Regulation0.39%
5V Load Regulation0.32%
3.3V Load Regulation0.42%
5VSB Load Regulation4.89%
Inrush Current20.190A
Efficiency RatingPLATINUM
Noise RatingA-
Average Efficiency (>1450 load combinations)91.840%
Average Noise Output (>1450 Load Combinations)26.26dBA
Average PF (>1450 Load Combinations)0.945
Efficiency With 10W (≤500W) or 2% (>500W) Load70.828%
Standby Power Consumption0.1474W
12V Ripple (Full Load)29.21mV
5V Ripple (Full Load)22.60mV
3.3V Ripple (Full Load)22.19mV
5VSB Ripple (Full Load)16.24mV
12V Load Regulation0.27%
5V Load Regulation0.30%
3.3V Load Regulation0.45%
5VSB Load Regulation4.87%
Inrush Current38.780A
12V Transient Response (200%)11.37V
5V Transient Response (200%)4.912V
3.3V Transient Response (200%)3.245V
5VSB Transient Response (200%)4.956V
Hold-Up Time & Power Ok Signal22.40ms
AC Loss to PWR_OK Hold Up Time14.30ms
PWR_OK Inactive to DC Loss Delay8.10ms
PSU Timings: T1 (20% / 100%)75.0ms69.0ms
PSU Timings: T3 (20% / 100%)117.0ms117.0ms
12V OCP (25.8°C / 40.7°C)92.80A (131.07%), 11.960V92.80A (131.07%), 11.976V
5V OCP (25.8°C / 40.7°C)24.9A (124.50%), 4.998V26.1A (130.50%), 5.002V
3.3V OCP (25.8°C / 40.7°C)31.4A (157.00%), 3.342V30A (150.00%), 3.343V
5VSB OCP (25.8°C / 40.7°C)4.9A (163.33%), 4.872V4.7A (156.67%), 4.874V
OPP (27.07°C / 42.17°C)128.84%123.25%

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)22.4
AC Loss to PWR_OK Hold Up Time (ms)14.3
PWR_OK Inactive to DC Loss Delay (ms)8.1

Vampire Power

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 115.06 V 115.02 V 113.85 V 115.10 V 116.15 V PASS
Mains Frequency: 60.00 Hz 59.99 Hz 59.40 Hz 60.01 Hz 60.60 Hz PASS
Mains Voltage CF: 1.416 1.415 1.340 1.418 1.490 PASS
Mains Voltage THD: 0.13 % 0.09 % N/A 0.18 % 2.00 % PASS
Real Power: 0.073 W 0.004 W N/A 0.106 W N/A N/A
Apparent Power: 10.040 W 9.965 W N/A 10.105 W N/A N/A
Power Factor: 0.008 N/A N/A N/A N/A N/A
Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 231.01 V 230.92 V 227.70 V 231.08 V 232.30 V PASS
Mains Frequency: 50.00 Hz 49.99 Hz 49.50 Hz 50.01 Hz 50.50 Hz PASS
Mains Voltage CF: 1.417 1.416 1.340 1.419 1.490 PASS
Mains Voltage THD: 0.17 % 0.14 % N/A 0.26 % 2.00 % PASS
Real Power: 0.147 W 0.112 W N/A 0.197 W N/A N/A
Apparent Power: 34.149 W 33.961 W N/A 34.382 W N/A N/A
Power Factor: 0.005 N/A N/A N/A N/A N/A

Graphs

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

Conducted Emissions EN55032 & CISPR 32

NEUTRAL
PHASE

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 0.23W 62.173% 0.036
5.113V 0.368W 114.84V
2 0.09A 0.46W 70.919% 0.062
5.111V 0.649W 114.84V
3 0.55A 2.8W 81.039% 0.266
5.09V 3.455W 114.84V
4 1A 5.07W 81.145% 0.372
5.069V 6.248W 114.83V
5 1.5A 7.57W 81.312% 0.42
5.046V 9.31W 114.84V
6 3.001A 14.929W 77.884% 0.492
4.975V 19.169W 114.85V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.23W 50.807% 0.013
5.113V 0.453W 229.87V
2 0.09A 0.46W 62.903% 0.021
5.111V 0.732W 229.86V
3 0.55A 2.8W 79.054% 0.098
5.09V 3.542W 229.83V
4 1A 5.07W 80.348% 0.164
5.069V 6.31W 229.82V
5 1.5A 7.57W 80.881% 0.224
5.046V 9.36W 229.82V
6 3.001A 14.931W 79.583% 0.325
4.976V 18.761W 229.82V

Protection Features

OCP (Normal @ 25.8°C)12V: 92.80A (131.07%), 11.960V
5V: 24.9A (124.50%), 4.998V
3.3V: 31.4A (157.00%), 3.342V
5VSB: 4.9A (163.33%), 4.872V
OCP (Hot @ 40.7°C)12V: 92.80A (131.07%), 11.976V
5V: 26.1A (130.50%), 5.002V
3.3V: 30A (150.00%), 3.343V
5VSB: 4.7A (156.67%), 4.874V
OPP (Normal @ 27.1°C)1095.16W (128.84%)
OPP (Hot @ 42.2°C)1047.63W (123.25%)
OTP✓ (110°C @ Heat Sink)
SCP12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OKProper Operation
UVP (Full Load @ 90V)✓
UVP (No Damage @ 80V)✓
Conducted Emissions EN55032 & CISPR 32✓
NLO✓
Fan Failure Protection✗
SIPSurge: MOV
Inrush: NTC & Bypass Relay

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
10% 5.304A 1.997A 1.972A 0.988A 84.998 88.222% 0 <6.0 45.01°C 0.973
11.955V 5.006V 3.346V 5.058V 96.344 40.24°C 114.81V
20% 11.627A 2.997A 2.959A 1.191A 169.918 91.177% 0 <6.0 47.82°C 0.972
11.957V 5.005V 3.345V 5.039V 186.358 40.96°C 114.78V
30% 18.302A 3.498A 3.455A 1.394A 254.919 91.975% 752 20 41.17°C 0.979
11.959V 5.003V 3.343V 5.02V 277.16 47.36°C 114.76V
40% 24.984A 3.999A 3.95A 1.6A 340.002 92.012% 966 27.4 41.72°C 0.985
11.960V 5.001V 3.342V 5.001V 369.521 47.2°C 114.72V
50% 31.290A 5.001A 4.941A 1.807A 424.777 91.702% 966 27.4 42.09°C 0.988
11.961V 4.999V 3.34V 4.982V 463.216 46.76°C 114.7V
60% 37.611A 6.004A 5.932A 2A 509.274 90.686% 968 27.4 42.95°C 0.991
11.967V 4.997V 3.338V 4.962V 561.586 48.09°C 114.67V
70% 43.905A 7.006A 6.924A 2.227A 594.704 90.018% 1164 32.5 43.33°C 0.993
11.971V 4.996V 3.337V 4.94V 660.653 50.65°C 114.64V
80% 50.257A 8.009A 7.915A 2.336A 679.528 89.247% 1269 35.1 43.64°C 0.994
11.971V 4.994V 3.335V 4.923V 761.409 52.23°C 114.61V
90% 57.001A 8.512A 8.399A 2.445A 764.964 88.448% 1540 39.9 44.68°C 0.995
11.973V 4.992V 3.333V 4.908V 864.877 53.02°C 114.56V
100% 63.476A 9.017A 8.913A 3.084A 849.799 87.493% 1698 42.1 45.72°C 0.996
11.974V 4.99V 3.332V 4.866V 971.279 54.63°C 114.54V
110% 69.818A 10.023A 9.998A 3.091A 934.388 86.43% 1988 46.6 46.66°C 0.996
11.976V 4.988V 3.33V 4.854V 1081.099 56.61°C 114.5V
CL1 0.117A 12.049A 11.89A 0A 101.299 84.088% 966 27.4 42.13°C 0.977
11.994V 4.996V 3.339V 5.09V 120.473 50.66°C 114.79V
CL2 0.116A 19.993A 0A 0A 101.341 83.03% 965 27.3 42.17°C 0.975
11.982V 4.999V 3.338V 5.095V 122.055 47.34°C 114.79V
CL3 0.116A 0A 19.737A 0A 67.382 78.289% 962 27.3 40.77°C 0.967
11.977V 4.998V 3.344V 5.095V 86.067 45.07°C 114.81V
CL4 71.023A 0A 0A 0.001A 849.492 88.525% 1543 39.9 47.32°C 0.995
11.961V 5V 3.341V 5.034V 959.606 53.62°C 114.55V

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
10% 5.302A 1.997A 1.972A 0.989A 85 89.316% 0 <6.0 46.35°C 0.819
11.959V 5.007V 3.347V 5.058V 95.169 40.27°C 229.82V
20% 11.624A 2.996A 2.959A 1.191A 169.923 92.494% 545 9 40.85°C 0.912
11.960V 5.005V 3.345V 5.039V 183.715 45.66°C 229.8V
30% 18.297A 3.498A 3.454A 1.394A 254.924 93.505% 626 14.1 41.48°C 0.94
11.962V 5.003V 3.344V 5.021V 272.629 45.39°C 229.79V
40% 24.988A 4A 3.951A 1.6A 340.019 93.647% 962 27.3 41.94°C 0.957
11.959V 5V 3.341V 5.002V 363.087 44.88°C 229.78V
50% 31.299A 5.002A 4.942A 1.807A 424.842 93.528% 963 27.3 42.21°C 0.964
11.960V 4.998V 3.339V 4.982V 454.242 45.55°C 229.77V
60% 37.570A 6.005A 5.933A 2A 509.34 92.662% 966 27.4 43.45°C 0.974
11.967V 4.997V 3.338V 4.962V 549.675 47.71°C 229.75V
70% 43.905A 7.007A 6.924A 2.227A 594.748 92.285% 1120 31.5 43.07°C 0.978
11.972V 4.996V 3.337V 4.94V 644.472 48.61°C 229.73V
80% 50.248A 8.008A 7.916A 2.336A 679.561 91.806% 1267 35 43.54°C 0.98
11.974V 4.995V 3.335V 4.924V 740.217 51.37°C 229.71V
90% 56.994A 8.51A 8.4A 2.445A 764.983 91.297% 1536 39.8 44.13°C 0.982
11.975V 4.993V 3.333V 4.909V 837.905 51.85°C 229.71V
100% 63.473A 9.014A 8.914A 3.083A 849.815 90.694% 1694 42 45.05°C 0.984
11.975V 4.992V 3.332V 4.867V 937.015 52.44°C 229.69V
110% 69.813A 10.02A 10A 3.09A 934.409 90.005% 1991 46.6 46.68°C 0.986
11.977V 4.99V 3.33V 4.855V 1038.171 55.18°C 229.67V
CL1 0.117A 12.043A 11.893A 0A 101.304 85.568% 967 27.4 42.05°C 0.857
11.993V 4.999V 3.338V 5.09V 118.391 50.74°C 229.81V
CL2 0.117A 19.976A 0A 0A 101.353 84.196% 965 27.3 43.3°C 0.859
11.984V 5.004V 3.338V 5.095V 120.38 48.05°C 229.82V
CL3 0.116A 0A 19.738A 0A 67.389 79.093% 963 27.3 41.97°C 0.798
11.979V 4.998V 3.344V 5.095V 85.2 45.88°C 229.82V
CL4 71.025A 0A 0A 0.001A 849.577 91.58% 1539 39.9 44.49°C 0.984
11.962V 4.999V 3.34V 5.033V 927.69 49.45°C 229.69V

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]) Temps (In/Out) PF/AC Volts
20W 1.244A 0.5A 0.493A 0.196A 19.989 73.175% 0 <6.0 38.94°C 0.851
11.935V 5.003V 3.345V 5.104V 27.318 36.18°C 114.84V
40W 2.740A 0.699A 0.69A 0.294A 39.991 82.547% 0 <6.0 40.08°C 0.931
11.928V 5.005V 3.346V 5.098V 48.445 37.05°C 114.83V
60W 4.229A 0.899A 0.887A 0.393A 59.993 86.304% 0 <6.0 42.49°C 0.949
11.948V 5.006V 3.346V 5.091V 69.511 38.98°C 114.81V
80W 5.714A 1.098A 1.085A 0.492A 79.925 88.463% 0 <6.0 43.2°C 0.97
11.950V 5.006V 3.346V 5.084V 90.347 39.27°C 114.81V

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
20W 1.242A 0.499A 0.493A 0.196A 19.991 73.447% 0 <6.0 39.33°C 0.473
11.943V 5.004V 3.347V 5.104V 27.239 36.11°C 229.84V
40W 2.736A 0.699A 0.69A 0.294A 39.993 83.542% 0 <6.0 40.55°C 0.647
11.948V 5.006V 3.347V 5.097V 47.86 37.12°C 229.84V
60W 4.228A 0.898A 0.887A 0.393A 59.995 87.327% 0 <6.0 42.17°C 0.746
11.951V 5.007V 3.347V 5.091V 68.68 38.01°C 229.82V
80W 5.714A 1.098A 1.084A 0.492A 79.928 89.397% 0 <6.0 44.18°C 0.807
11.952V 5.007V 3.347V 5.084V 89.405 39.39°C 229.82V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load18.98mV17.04mV16.93mV9.70mVPass
20% Load19.44mV16.73mV15.34mV8.98mVPass
30% Load18.36mV16.63mV15.80mV9.65mVPass
40% Load18.92mV17.09mV16.11mV10.62mVPass
50% Load20.15mV17.81mV16.88mV11.24mVPass
60% Load20.72mV20.12mV17.65mV11.75mVPass
70% Load20.30mV19.97mV21.19mV13.08mVPass
80% Load20.66mV20.89mV19.24mV13.65mVPass
90% Load21.53mV20.73mV19.65mV14.32mVPass
100% Load28.25mV22.96mV20.83mV17.02mVPass
110% Load29.27mV23.45mV20.35mV17.13mVPass
Crossload124.51mV19.43mV19.68mV12.82mVPass
Crossload218.62mV22.27mV21.70mV12.98mVPass
Crossload318.56mV20.12mV18.06mV11.65mVPass
Crossload429.62mV19.08mV16.63mV18.17mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load17.29mV15.55mV14.98mV8.67mVPass
20% Load17.55mV15.24mV14.62mV9.13mVPass
30% Load18.21mV15.65mV14.67mV9.13mVPass
40% Load17.59mV15.91mV15.03mV9.85mVPass
50% Load20.20mV16.83mV16.32mV10.77mVPass
60% Load18.87mV19.66mV17.55mV11.91mVPass
70% Load18.87mV20.01mV17.96mV12.16mVPass
80% Load19.84mV19.45mV18.72mV13.85mVPass
90% Load20.76mV20.58mV18.52mV13.75mVPass
100% Load29.21mV22.60mV22.19mV16.24mVPass
110% Load29.97mV22.69mV23.65mV16.52mVPass
Crossload123.63mV20.42mV20.11mV12.32mVPass
Crossload217.65mV20.43mV20.88mV12.06mVPass
Crossload317.03mV19.61mV17.55mV11.39mVPass
Crossload426.89mV18.28mV19.05mV18.19mVPass

The results above are not used in the certification process

Montech Century II Gold 850 ATX3

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