CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Version:00
darkFlash PERFECTMOST 850W
Serial Number02ZYA040110254100576
Lab IDDF85002979
Certification ID252979
  • Test Result Report ID: 25PS2979A
  • Certificate Issue Date: Oct 16, 2025
115V230V
Scheme: ETA-EMI PSU
115V230V
Scheme: LAMBDA PSU
Aristeidis Bitziopoulos, Certification Body General Manager

General Information

DUT Information

BranddarkFlash
Manufacturer (OEM)Zhong Yuan Power
SeriesPERFECTMOST
Model NumberPMT850
Serial Number02ZYA040110254100576
DUT Notes

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)5-10
Rated Frequency (Hz)50-60
Rated Power (W)850
TypeATX12V
Dimensions (W x H x D)
Cooling120mm Fluid Dynamic Bearing Fan (HA1225M12F-Z)
Semi-Passive Operation✓
Cable DesignFully Modular

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps181870.830.3
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 Cable Type
ATX connector 20+4 pin (600mm) 1 1 18AWG Tinned Copper
4+4 pin ATX12V (700mm) 2 2 18AWG Tinned Copper
6+2 pin PCIe (600mm) 3 3 18AWG Tinned Copper
12+4 pin PCIe (655mm) (600W) 1 1 16-24AWG Tinned Copper
SATA (450mm+155mm+155mm) / 4-pin Molex (+155mm) 2 6 / 2 18AWG Tinned Copper
SATA (450mm+155mm) / 4-pin Molex (+155mm+155mm) 1 2 / 2 18AWG Tinned Copper
AC Power Cord (1400mm) - C13 coupler 1 1 18AWG -

Parts Description

General Data
Manufacturer (OEM) Zhong Yuan Power
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 1x X caps, 2x CM chokes, 1x MOV, 1x LII Semi LN9901 (X caps discharge IC)
Inrush Protection NTC Thermistor SCK-205R0 (5 Ohm @ 25°C) & Relay
Bridge Rectifier
2x GBU1508 (800V, 15A @ 100°C)
APFC MOSFETs
2x Sanrise SRC60R140B (600V, 11.2A @ 125°C, Rds(on): 140mOhm)
APFC Boost Diode
CRMicro CRXF08D065G2 (650V, 8A @ 151°C)
Bulk Cap(s)
Toshin Kogyo (420V, 680uF, 2000h @ 105°C, LW)
Main Switchers
2x CRMicro CRJS99N65G2F (650V, 20A @ 100°C, Rds(on): 103mOhm)

APFC Controller

Infineon ICE2PCS01
Resonant Controller
Monolithic Power HR1213
Topology Primary side: APFC, Half-Bridge & LLC Resonant Converter
Secondary side: [12V] Synchronous Rectification & [Minor Rails] DC-DC converters
Secondary Side
+12V MOSFETs 6x InPower Semiconductor FTG014N04SA
5V & 3.3V DC-DC Converters: 4x Maple Semi SLM100N03T (30V, 65A @ 100°C, Rds(on): 4mOhm)
PWM Controller(s): ANPEC APW7159A
Filtering Capacitors

Electrolytic:
6x TK (@ 105°C, SZ)
Polymer:
25x NJCon
Supervisor IC UTC8313F
Fan Model Hong Hua HA1225M12F-Z (125mm, 12V, 0.45A, Fluid Dynamic Bearing Fan)
5VSB Circuit
Rectifier
Standby PWM Controller
Xuanyan XY6115

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)89.264%
Average Noise Output (>1450 Load Combinations)26.99dBA
Average PF (>1450 Load Combinations)0.995
Efficiency With 10W (≤500W) or 2% (>500W) Load71.310%
Standby Power Consumption0.0459W
12V Ripple (Full Load)31.97mV
5V Ripple (Full Load)12.91mV
3.3V Ripple (Full Load)18.02mV
5VSB Ripple (Full Load)10.19mV
12V Load Regulation0.13%
5V Load Regulation0.48%
3.3V Load Regulation0.81%
5VSB Load Regulation3.75%
Inrush Current34.710A
Efficiency RatingPLATINUM
Noise RatingA-
Average Efficiency (>1450 load combinations)91.179%
Average Noise Output (>1450 Load Combinations)25.64dBA
Average PF (>1450 Load Combinations)0.975
Efficiency With 10W (≤500W) or 2% (>500W) Load72.418%
Standby Power Consumption0.1069W
12V Ripple (Full Load)31.52mV
5V Ripple (Full Load)12.79mV
3.3V Ripple (Full Load)19.21mV
5VSB Ripple (Full Load)9.86mV
12V Load Regulation0.12%
5V Load Regulation0.44%
3.3V Load Regulation0.84%
5VSB Load Regulation3.83%
Inrush Current66.450A
12V Transient Response (200%)11.38V
5V Transient Response (200%)4.876V
3.3V Transient Response (200%)3.273V
5VSB Transient Response (200%)4.951V
Hold-Up Time & Power Ok Signal24.90ms
AC Loss to PWR_OK Hold Up Time20.20ms
PWR_OK Inactive to DC Loss Delay4.70ms
PSU Timings: T1 (20% / 100%)101.0ms103.0ms
PSU Timings: T3 (20% / 100%)125.0ms124.0ms
12V OCP (27.8°C / 46.4°C)104.20A (147.18%), 12.053V102.80A (145.20%), 12.066V
5V OCP (27.8°C / 46.4°C)22.5A (125.00%), 4.993V22.7A (126.11%), 4.993V
3.3V OCP (27.8°C / 46.4°C)24.2A (134.44%), 3.323V23.3A (129.44%), 3.324V
5VSB OCP (27.8°C / 46.4°C)3.8A (126.67%), 4.967V3.8A (126.67%), 4.96V
OPP (29.10°C / 45.63°C)146.83%145.06%

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)24.9
AC Loss to PWR_OK Hold Up Time (ms)20.2
PWR_OK Inactive to DC Loss Delay (ms)4.7

Vampire Power

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 115.00 V 114.97 V 113.85 V 115.01 V 116.15 V PASS
Mains Frequency: 60.00 Hz 59.92 Hz 59.40 Hz 60.01 Hz 60.60 Hz PASS
Mains Voltage CF: 1.416 1.415 1.340 1.416 1.490 PASS
Mains Voltage THD: 0.13 % 0.10 % N/A 0.30 % 2.00 % PASS
Real Power: 0.046 W 0.025 W N/A 0.068 W N/A N/A
Apparent Power: 5.438 W 5.417 W N/A 5.462 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: 230.00 V 229.98 V 227.70 V 230.02 V 232.30 V PASS
Mains Frequency: 50.00 Hz 50.00 Hz 49.50 Hz 50.00 Hz 50.50 Hz PASS
Mains Voltage CF: 1.415 1.415 1.340 1.416 1.490 PASS
Mains Voltage THD: 0.14 % 0.13 % N/A 0.16 % 2.00 % PASS
Real Power: 0.107 W 0.057 W N/A 0.269 W N/A N/A
Apparent Power: 17.131 W 17.090 W N/A 17.184 W N/A N/A
Power Factor: 0.007 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 70.008% 0.065
5.098V 0.328W 114.98V
2 0.09A 0.459W 74.768% 0.117
5.097V 0.614W 114.88V
3 0.55A 2.796W 80.874% 0.352
5.082V 3.457W 114.96V
4 1A 5.068W 81% 0.417
5.066V 6.257W 114.98V
5 1.5A 7.574W 80.873% 0.445
5.048V 9.366W 114.98V
6 3.001A 14.977W 78.307% 0.479
4.991V 19.128W 114.87V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.23W 59.357% 0.023
5.099V 0.388W 230.12V
2 0.09A 0.459W 67.627% 0.041
5.098V 0.679W 230.09V
3 0.55A 2.796W 78.439% 0.182
5.083V 3.565W 230.08V
4 1A 5.068W 79.882% 0.264
5.067V 6.345W 230.09V
5 1.5A 7.575W 80.201% 0.314
5.049V 9.446W 230.09V
6 3A 14.986W 79.307% 0.387
4.995V 18.897W 230.1V

Protection Features

OCP (Normal @ 27.8°C)12V: 104.20A (147.18%), 12.053V
5V: 22.5A (125.00%), 4.993V
3.3V: 24.2A (134.44%), 3.323V
5VSB: 3.8A (126.67%), 4.967V
OCP (Hot @ 46.4°C)12V: 102.80A (145.20%), 12.066V
5V: 22.7A (126.11%), 4.993V
3.3V: 23.3A (129.44%), 3.324V
5VSB: 3.8A (126.67%), 4.96V
OPP (Normal @ 29.1°C)1248.05W (146.83%)
OPP (Hot @ 45.6°C)1233.04W (145.06%)
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% 5.245A 1.999A 1.972A 0.989A 85.01 85.382% 873 23.3 40.3°C 0.988
12.088V 5.005V 3.347V 5.055V 99.551 45.58°C 114.92V
20% 11.508A 2.999A 2.961A 1.191A 169.983 89.838% 874 23.3 40.64°C 0.993
12.085V 5.003V 3.344V 5.04V 189.21 46.33°C 114.89V
30% 18.118A 3.5A 3.456A 1.394A 254.994 91.028% 879 23.3 41.26°C 0.996
12.084V 5.001V 3.342V 5.025V 280.125 47.8°C 114.88V
40% 24.735A 4.002A 3.952A 1.597A 340.086 91.281% 886 23.8 41.6°C 0.997
12.083V 4.999V 3.34V 5.01V 372.567 49.61°C 114.86V
50% 31.004A 5.004A 4.944A 1.803A 425.098 91.076% 968 26.6 42.15°C 0.998
12.082V 4.997V 3.338V 4.994V 466.752 51.64°C 114.84V
60% 37.235A 6.008A 5.938A 2.001A 509.59 90.613% 1171 32.4 42.8°C 0.998
12.081V 4.995V 3.335V 4.978V 562.385 52.89°C 114.82V
70% 43.534A 7.013A 6.933A 2.218A 594.957 90.01% 1366 36.4 43.19°C 0.998
12.079V 4.993V 3.333V 4.961V 660.984 53.91°C 114.8V
80% 49.837A 8.016A 7.928A 2.324A 679.774 89.35% 1604 40.5 43.78°C 0.998
12.077V 4.99V 3.33V 4.949V 760.797 55.96°C 114.78V
90% 56.539A 8.521A 8.414A 2.431A 765.206 88.645% 1804 43.9 44.52°C 0.998
12.075V 4.988V 3.327V 4.937V 863.216 57.38°C 114.76V
100% 62.975A 9.025A 8.931A 3.058A 850.019 87.768% 1972 47 45.37°C 0.999
12.074V 4.986V 3.325V 4.906V 968.483 60.51°C 114.74V
110% 69.280A 10.033A 10.022A 3.065A 934.634 86.709% 1975 47 46.32°C 0.999
12.072V 4.984V 3.322V 4.895V 1077.967 63.86°C 114.71V
CL1 0.116A 12.051A 11.892A 0A 101.307 81.265% 906 24.5 41.24°C 0.989
12.092V 4.996V 3.338V 5.075V 124.664 51.22°C 114.93V
CL2 0.116A 18.028A 0A 0A 91.402 80.387% 896 24.1 41.23°C 0.989
12.092V 4.992V 3.351V 5.082V 113.701 49.46°C 114.94V
CL3 0.115A 0A 17.825A 0A 60.793 72.424% 884 23.7 40.28°C 0.983
12.092V 5.008V 3.332V 5.081V 83.941 47.76°C 114.95V
CL4 70.395A 0A 0A 0A 849.726 88.726% 1909 45.6 45.66°C 0.999
12.071V 4.997V 3.335V 5.029V 957.683 58.12°C 114.74V

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% 5.245A 1.998A 1.972A 0.99A 85.011 87.023% 0 <6.0 48.63°C 0.886
12.090V 5.006V 3.348V 5.054V 97.692 40.16°C 230.01V
20% 11.506A 2.999A 2.961A 1.191A 169.989 91.222% 874 23.3 40.84°C 0.961
12.087V 5.003V 3.344V 5.039V 186.344 46.27°C 230V
30% 18.115A 3.5A 3.457A 1.394A 255.014 92.408% 880 23.4 41.23°C 0.981
12.086V 5.001V 3.342V 5.024V 275.969 47.42°C 229.99V
40% 24.734A 4.002A 3.953A 1.598A 340.142 92.87% 918 24.9 41.82°C 0.989
12.086V 4.999V 3.34V 5.008V 366.253 50.34°C 229.98V
50% 31.012A 5.005A 4.946A 1.803A 425.269 92.85% 979 26.8 42.1°C 0.991
12.084V 4.997V 3.337V 4.992V 458.043 50.62°C 229.96V
60% 37.238A 6.009A 5.94A 2.001A 509.707 92.628% 1173 32.5 42.67°C 0.992
12.083V 4.994V 3.334V 4.977V 550.276 51.47°C 229.95V
70% 43.535A 7.013A 6.936A 2.219A 595.093 92.233% 1418 37.5 43.18°C 0.993
12.081V 4.993V 3.331V 4.96V 645.216 53.16°C 229.94V
80% 49.837A 8.015A 7.934A 2.325A 679.934 91.817% 1612 40.7 43.53°C 0.994
12.080V 4.992V 3.328V 4.947V 740.549 54.19°C 229.93V
90% 56.539A 8.519A 8.421A 2.432A 765.38 91.389% 1819 44.3 44.04°C 0.994
12.078V 4.99V 3.325V 4.935V 837.503 55.67°C 229.91V
100% 62.976A 9.023A 8.939A 3.06A 850.197 90.851% 1971 47 45.21°C 0.995
12.076V 4.988V 3.323V 4.903V 935.822 57.58°C 229.89V
110% 69.278A 10.028A 10.03A 3.067A 934.792 90.191% 1977 47 46.52°C 0.995
12.074V 4.987V 3.32V 4.893V 1036.459 61.29°C 229.88V
CL1 0.117A 12.039A 11.896A 0A 101.324 82.672% 918 24.9 40.45°C 0.92
12.091V 5.001V 3.337V 5.075V 122.561 50.01°C 230V
CL2 0.116A 17.997A 0A 0A 91.415 81.735% 894 24 40.52°C 0.907
12.092V 5.001V 3.35V 5.082V 111.841 48.43°C 229.99V
CL3 0.116A 0A 17.826A 0A 60.806 73.548% 885 23.8 41.09°C 0.854
12.091V 5.007V 3.332V 5.081V 82.676 47.63°C 229.99V
CL4 70.393A 0A 0A 0A 849.887 91.83% 1937 46.3 45.18°C 0.995
12.074V 4.996V 3.333V 5.028V 925.505 56.48°C 229.88V

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 1.229A 0.499A 0.492A 0.196A 20.01 73.504% 0 <6.0 45.14°C 0.88
12.089V 5.01V 3.352V 5.09V 27.223 36.39°C 114.94V
40W 2.705A 0.699A 0.689A 0.295A 40.008 81.198% 0 <6.0 45.9°C 0.954
12.089V 5.009V 3.351V 5.084V 49.272 37.3°C 114.92V
60W 4.180A 0.899A 0.887A 0.394A 60.008 83.993% 0 <6.0 47.48°C 0.974
12.089V 5.008V 3.35V 5.079V 71.446 38.55°C 114.92V
80W 5.654A 1.099A 1.084A 0.493A 79.983 86.394% 0 <6.0 49.63°C 0.986
12.089V 5.007V 3.349V 5.073V 92.58 39.66°C 114.91V

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 1.230A 0.499A 0.492A 0.196A 20.01 74.434% 0 <6.0 44.8°C 0.587
12.087V 5.01V 3.351V 5.091V 26.884 36.64°C 230V
40W 2.705A 0.699A 0.69A 0.295A 40.008 82.45% 0 <6.0 44.88°C 0.727
12.087V 5.01V 3.35V 5.085V 48.529 37.39°C 230V
60W 4.181A 0.899A 0.887A 0.394A 60.007 85.505% 0 <6.0 47.71°C 0.818
12.087V 5.009V 3.35V 5.08V 70.177 38.71°C 230V
80W 5.654A 1.099A 1.084A 0.493A 79.978 87.274% 0 <6.0 47.53°C 0.874
12.088V 5.007V 3.349V 5.074V 91.641 39.31°C 230V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load15.78mV8.93mV10.02mV6.01mVPass
20% Load9.21mV7.45mV7.43mV6.32mVPass
30% Load10.28mV9.95mV10.12mV6.78mVPass
40% Load11.76mV8.26mV8.24mV6.93mVPass
50% Load13.99mV8.77mV8.75mV7.18mVPass
60% Load16.33mV11.33mV10.48mV7.28mVPass
70% Load19.59mV13.62mV11.24mV8.87mVPass
80% Load23.41mV13.98mV17.44mV8.61mVPass
90% Load28.39mV13.11mV18.00mV8.91mVPass
100% Load31.97mV12.91mV18.02mV10.19mVPass
110% Load37.41mV13.85mV19.42mV10.30mVPass
Crossload18.94mV15.66mV15.98mV10.13mVPass
Crossload28.91mV8.62mV7.02mV10.39mVPass
Crossload315.52mV9.64mV17.50mV11.11mVPass
Crossload433.23mV10.37mV11.81mV13.13mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load16.54mV44.94mV32.76mV7.59mVPass
20% Load10.03mV7.65mV7.47mV6.78mVPass
30% Load9.77mV8.31mV9.31mV6.11mVPass
40% Load12.06mV9.18mV9.92mV6.88mVPass
50% Load13.23mV7.86mV8.39mV6.52mVPass
60% Load16.49mV13.97mV13.89mV14.11mVPass
70% Load19.90mV13.32mV11.29mV7.90mVPass
80% Load24.02mV13.93mV17.90mV8.81mVPass
90% Load29.05mV12.85mV17.80mV8.56mVPass
100% Load31.52mV12.79mV19.21mV9.86mVPass
110% Load38.84mV13.82mV19.74mV10.35mVPass
Crossload19.04mV14.37mV14.16mV10.96mVPass
Crossload210.23mV8.47mV7.12mV10.54mVPass
Crossload324.93mV10.35mV18.16mV11.16mVPass
Crossload431.93mV10.29mV11.88mV12.78mVPass

The results above are not used in the certification process

darkFlash PERFECTMOST 850W

Top side
Power specifications label
Fan
PSU Internals
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