CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Cooler Master MWE Gold 850 V4
Serial Number-
Lab IDCM85003435
Certification ID263435
  • Test Result Report ID: 26PS3435A
  • Certificate Issue Date: Oct 8, 2026
115V230V
Scheme: ETA-EMI PSU
115V230V
Scheme: LAMBDA PSU
Outside Validation Scope
Aristeidis Bitziopoulos, Certification Body General Manager

General Information

Test Equipment

Electronic Loads Chroma 63601-5 x2
Chroma 63600-2
Chroma 63640-80-80 x10
Chroma 63610-80-20
AC Sources Chroma 6530, APM SP300VAC4000W-P, GW Instek ASR-3500
Power Analyzers Rohde & Schwarz HMC8015 & NPA701
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
EMI Analyzer TekBox TBMR-110M-EU
Isolation Transformer 4kVA
UPS FSP Champ Tower 3kVA, CyberPower OLS3000E 3kVA
Testing Methodology Cybenetics PSU Test Protocol

DUT Information(Non-accredited measurements)

Product Identification Details
BrandCooler Master
ModelMWE Gold 850 V4
OEM/ODMGOSPOWER
Serial Number-
Product Specifications
Manufacturer-Provided Information
Rated Voltage (Vrms)100-240
Rated Current (Arms)6-10
Rated Frequency (Hz)50-60
Rated Power (W)850
Operating Temperature (Continuous Full Load) (°C)0 - 40
TypeATX12V
Cable DesignFully Modular
Warranty10 years
Cybenetics Measurements
Dimensions (W x H x D)150 x 86 x 140mm
Weight1.30 kg (2.87 lb)
Cooling120mm Fluid Dynamic Bearing Fan (HA1225H12F-Z)
Semi-Passive Operation✓
Cybenetics Testing Information
Lab IDCM85003435
Date of receiptSep 10, 2026
Testing DateOct 2, 2026
Report Issued DateOct 8, 2026
Engineer NameIoannis Kalyviotis
Authorized By the Laboratory Technical ManagerAristeidis Bitziopoulos
Signature

Cables and Connectors(Non-accredited measurements)

Modular Cables
Description Cable Count Connector Count (Total) Gauge Cable Type
ATX connector 24 pin (600mm) 1 1 18AWG Tinned Copper
4+4 pin EPS12V (700mm) 1 1 18AWG Tinned Copper
8 pin EPS12V (700mm) 1 1 18AWG Tinned Copper
6+2 pin PCIe (600mm+125mm) 2 4 16-18AWG Tinned Copper
12+4 pin PCIe (600mm) (600W) 1 1 16-24AWG Tinned Copper
SATA (400mm+110mm+110mm) 2 6 18AWG Tinned Copper
4-pin Molex (400mm+120mm+120mm) 1 3 18AWG Tinned Copper
AC Power Cord (1350mm) - C13 coupler 1 1 3G 0.75mm² -

Protection Features(Manufacturer)

Over Power Protection✓
Over Current (+12V) Protection✓
Over Temperature Protection✓
Short Circuit Protection✓
Surge Protection✓
Inrush Current Protection✓
Fan Failure Protection✗

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202070.830.3
Watts120849.6153.6
Total Max. Power (W)850

Parts Description

General Data
Manufacturer (OEM)

GOSPOWER
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 3x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC 5D-20 (5 Ohm @ 25°C) & Relay
Bridge Rectifier 2x GBU1008 (800V, 10A @ 100°C)
APFC MOSFETs 1x Oriental Semiconductor OSG65R070HT3F (650V, 29.7A @ 100°C, Rds(on): 0.070Ohm)
APFC Boost Diode 1x Zhixin Microelectronics SDC10065NAS (650V, 10A @ 150°C)
Bulk Cap(s) 1x Toshin Kogyo (450V, 470uF, 2000h @ 105°C, LGW  )
Main Switchers 2x CR Micro CRJF99N65G2BF (650V, 20A @ 100°C, Rds(on): 0.099Ohm)

APFC+LLC Combo Controller

MPS HR1280

Topology Primary side: APFC, Half-Bridge & LLC Resonant Converter
Secondary side: [12V] Synchronous Rectification & [Minor Rails] DC-DC converters
Secondary Side
+12V MOSFETs 4x 014N04B
5V & 3.3V DC-DC Converters: 4x CRSM035N03L6Z (30V, 54A @ 100°C, Rds(on): 3.5mOhm)
PWM Controller(s): 1x APW7391
Filtering Capacitors Electrolytic:
2x CapXon (2000~5000h@ 105°C, KF )
1x CapXon (3000~7000h @ 105°C, GH )
1x Elite (2000h @ 105°C, EL )
Polymer:
17x CapXon
19x Nichicon
Supervisor IC INFSitronix IN1T709-SDG
Fan Model Hong Hua HA1225H12F-Z (120mm, 12V, 0.58A, Fluid Dynamic Bearing Fan )
5VSB Circuit
Rectifier Yangjie SS10U45
Standby PWM Controller INFSitronix IN2P380C

Test Results

Temperature & Compliance Info

Temperature Range (°C /°F)28-32 / 82.4-89.6
ErP Lot 3/6 Ready✓
(EU) No 617/2013 Compliance✓
ALPM (Alternative Low Power Mode) compatible✓
ATX v3.1 PSU Power Excursion✓
Conducted Emissions EN 55032 & CISPR 32Passed

Performance Summary

Accredited
Average Efficiency (>1450 load combinations)89.499%
Average Noise Output (>1450 Load Combinations)27.55dBA
Average PF (>1450 Load Combinations)0.987
Efficiency With 10W (≤500W) or 2% (>500W) Load68.676%
Standby Power Consumption0.0828W
Non-Accredited
12V Ripple (Full Load)35.98mV
5V Ripple (Full Load)27.29mV
3.3V Ripple (Full Load)22.58mV
5VSB Ripple (Full Load)21.86mV
12V Load Regulation1.57%
5V Load Regulation0.12%
3.3V Load Regulation0.34%
5VSB Load Regulation3.80%
Inrush Current29.130A
Accredited
Average Efficiency (>1450 load combinations)91.625%
Average Noise Output (>1450 Load Combinations)27.55dBA
Average PF (>1450 Load Combinations)0.943
Efficiency With 10W (≤500W) or 2% (>500W) Load70.158%
Standby Power Consumption0.1658W
Non-Accredited
12V Ripple (Full Load)35.11mV
5V Ripple (Full Load)25.15mV
3.3V Ripple (Full Load)21.97mV
5VSB Ripple (Full Load)20.68mV
12V Load Regulation0.83%
5V Load Regulation0.12%
3.3V Load Regulation0.15%
5VSB Load Regulation3.76%
Inrush Current65.590A
12V Transient Response (200%)11.41V
5V Transient Response (200%)4.963V
3.3V Transient Response (200%)3.234V
5VSB Transient Response (200%)4.817V
Hold-Up Time & PWR_OK Signal18.40ms
AC Loss to PWR_OK Hold Up Time16.00ms
PWR_OK Inactive to DC Loss Delay2.40ms
PSU Timings: T1 (20% / 100%)116.0ms118.0ms
PSU Timings: T3 (20% / 100%)118.0ms118.0ms
12V OCP (30.7°C / 41.9°C)81.300A (114.83%), 11.992V — shut down81.600A (115.25%), 11.986V — shut down
5V OCP (30.7°C / 41.9°C)24.000A (120.00%), 5.209V — shut down24.000A (120.00%), 5.221V — shut down
3.3V OCP (30.7°C / 41.9°C)24.000A (120.00%), 3.443V — shut down23.900A (119.50%), 3.451V — shut down
5VSB OCP (30.7°C / 41.9°C)4.300A (143.33%), 4.880V — shut down4.300A (143.33%), 4.888V — shut down
OPP (27.31°C / 43.02°C)128.57%128.59%

Hold-Up Time & PWR_OK Signal

Hold-Up Time (ms)18.4
AC Loss to PWR_OK Hold Up Time (ms)16.0
PWR_OK Inactive to DC Loss Delay (ms)2.4

Stromverbrauch im Ruhezustand

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 115.02 V 114.99 V 113.85 V 115.09 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 1.417 1.490 PASS
Mains Voltage THD: 0.13 % 0.11 % N/A 0.15 % 2.00 % PASS
Real Power: 0.083 W 0.058 W N/A 0.214 W N/A N/A
Apparent Power: 17.469 W 17.440 W N/A 17.501 W N/A N/A
Power Factor: 0.004 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 229.97 V 227.70 V 230.01 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: 0.166 W 0.121 W N/A 0.281 W N/A N/A
Apparent Power: 58.334 W 58.304 W N/A 58.371 W N/A N/A
Power Factor: 0.003 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

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

Conducted Emissions EN 55032 & 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 0.231W 64.334% 0.021
5.123V 0.358W 114.99V
2 0.09A 0.461W 71.57% 0.037
5.121V 0.644W 114.97V
3 0.55A 2.807W 80.491% 0.181
5.101V 3.487W 114.93V
4 1A 5.083W 79.966% 0.284
5.081V 6.356W 114.93V
5 1.5A 7.591W 80.244% 0.354
5.059V 9.459W 114.94V
6 3.001A 14.979W 78.607% 0.455
4.992V 19.056W 114.94V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.231W 56.248% 0.007
5.122V 0.41W 230.06V
2 0.09A 0.461W 65.938% 0.012
5.121V 0.699W 230.06V
3 0.55A 2.806W 78.87% 0.06
5.101V 3.558W 230.06V
4 1A 5.082W 79.928% 0.105
5.081V 6.359W 230.07V
5 1.5A 7.59W 79.983% 0.15
5.059V 9.49W 230.07V
6 3.001A 14.978W 79.527% 0.255
4.992V 18.834W 230.07V

Protection Features

OCP (Normal @ 30.7°C)12V: 81.300A (114.83%), 11.992V — shut down
5V: 24.000A (120.00%), 5.209V — shut down
3.3V: 24.000A (120.00%), 3.443V — shut down
5VSB: 4.300A (143.33%), 4.880V — shut down
OCP (Hot @ 41.9°C)12V: 81.600A (115.25%), 11.986V — shut down
5V: 24.000A (120.00%), 5.221V — shut down
3.3V: 23.900A (119.50%), 3.451V — shut down
5VSB: 4.300A (143.33%), 4.888V — shut down
OVP (per rail)12V: 13.900V (✓)
5V: 5.880V (✓)
3.3V: 3.940V (✓)
OPP (Normal @ 27.3°C)1092.82W (128.57%) — shut down
OPP (Hot @ 43.0°C)1093.00W (128.59%) — shut down
OTP✓ (100°C @ 12V Heatsink)
SCP12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OKProper Operation
UVP (Typical Load @ 90V)✓
UVP (No Damage @ 80V)✓
Conducted Emissions EN 55032 & 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% 5.265A 1.978A 2.002A 0.986A 85 85.684% 207 <6.0 40.12°C 0.938
12.044V 5.056V 3.297V 5.071V 99.202 44.67°C 114.94V
20% 11.572A 2.967A 3.003A 1.187A 169.95 89.5% 800 12.6 40.63°C 0.964
12.018V 5.057V 3.297V 5.056V 189.888 46.68°C 114.93V
30% 18.291A 3.462A 3.506A 1.389A 254.963 90.417% 825 13.7 41.43°C 0.987
11.974V 5.056V 3.295V 5.042V 281.986 46.75°C 114.9V
40% 24.947A 3.958A 4.01A 1.592A 340.069 90.894% 823 13.7 41.67°C 0.995
11.983V 5.054V 3.292V 5.027V 374.138 47.62°C 114.87V
50% 31.367A 4.947A 5.013A 1.796A 425.075 90.64% 924 17.0 42.84°C 0.998
11.948V 5.055V 3.292V 5.011V 468.973 48.61°C 114.85V
60% 37.624A 5.936A 6.016A 2.001A 509.643 90.55% 1152 24.1 42.82°C 0.998
11.960V 5.055V 3.292V 4.996V 562.833 49.02°C 114.81V
70% 44.101A 6.925A 7.02A 2.209A 594.935 89.763% 1780 37.0 43.09°C 0.998
11.929V 5.056V 3.291V 4.981V 662.786 50.56°C 114.79V
80% 50.562A 7.91A 8.018A 2.314A 679.739 89.226% 1782 37.0 43.75°C 0.999
11.910V 5.057V 3.292V 4.97V 761.815 52.57°C 114.76V
90% 57.416A 8.41A 8.513A 2.42A 765.156 88.659% 2140 42.3 44.74°C 0.999
11.898V 5.054V 3.289V 4.96V 863.031 51.07°C 114.76V
100% 64.105A 8.909A 9.037A 3.046A 849.967 87.889% 2138 42.3 45.44°C 0.999
11.870V 5.052V 3.286V 4.925V 967.092 51.46°C 114.73V
110% 69.902A 9.894A 10.127A 3.051A 934.566 87.931% 2146 42.8 46.53°C 0.999
11.964V 5.054V 3.288V 4.918V 1062.839 55.38°C 114.71V
CL1 0.116A 14.094A 14.203A 0A 121.297 83.808% 804 12.6 40.36°C 0.955
12.057V 5.123V 3.358V 5.104V 144.732 49.05°C 114.93V
CL2 0.115A 19.303A 0A 0A 101.395 82.451% 800 12.6 41.25°C 0.951
12.064V 5.181V 3.269V 5.111V 122.976 44.39°C 114.94V
CL3 0.115A 0A 19.341A 0A 67.387 77.104% 797 12.6 40.25°C 0.93
12.035V 5.026V 3.412V 5.11V 87.397 43.27°C 114.94V
CL4 71.002A 0A 0A 0A 849.741 89.243% 2142 42.3 45.87°C 0.999
11.969V 5.011V 3.248V 5.074V 952.161 50.06°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 1.979A 2.002A 0.986A 85.005 87.218% 345 7.5 40.39°C 0.742
12.087V 5.055V 3.297V 5.07V 97.463 42.2°C 230.08V
20% 11.516A 2.968A 3.003A 1.187A 169.98 91.474% 801 12.6 40.71°C 0.883
12.077V 5.056V 3.297V 5.056V 185.824 45.45°C 230.05V
30% 18.143A 3.463A 3.504A 1.389A 254.996 92.799% 827 13.7 41.15°C 0.932
12.067V 5.054V 3.296V 5.041V 274.782 46.83°C 230.04V
40% 24.785A 3.959A 4.007A 1.592A 340.084 93.318% 827 13.7 41.82°C 0.956
12.058V 5.053V 3.295V 5.026V 364.434 47.51°C 230.03V
50% 31.085A 4.949A 5.007A 1.796A 425.056 93.429% 930 17.0 42.47°C 0.97
12.049V 5.053V 3.296V 5.011V 454.951 47.85°C 230.01V
60% 37.355A 5.939A 6.008A 2.001A 509.58 93.336% 1157 24.1 42.62°C 0.979
12.040V 5.053V 3.296V 4.997V 545.964 47.23°C 230V
70% 43.699A 6.929A 7.01A 2.208A 594.903 93.108% 1192 24.6 43.01°C 0.985
12.032V 5.053V 3.296V 4.982V 638.936 46.14°C 229.98V
80% 50.070A 7.916A 8.008A 2.313A 679.737 92.673% 1303 27.3 43.82°C 0.989
12.020V 5.054V 3.296V 4.972V 733.479 46.06°C 229.99V
90% 56.840A 8.414A 8.501A 2.419A 765.164 92.368% 2144 42.8 44.53°C 0.991
12.010V 5.051V 3.293V 4.962V 828.388 46.78°C 229.95V
100% 63.358A 8.911A 9.017A 3.045A 849.977 92.026% 2144 42.8 45.69°C 0.993
12.000V 5.05V 3.293V 4.927V 923.632 48.62°C 229.96V
110% 69.777A 9.897A 10.103A 3.05A 934.563 91.623% 2149 42.8 46.01°C 0.995
11.985V 5.052V 3.296V 4.919V 1020.009 51.78°C 229.94V
CL1 0.116A 14.107A 14.169A 0A 121.302 85.319% 806 12.6 40.16°C 0.837
12.079V 5.118V 3.366V 5.103V 142.174 49.23°C 230.04V
CL2 0.115A 19.321A 0A 0A 101.395 83.735% 802 12.6 40.83°C 0.801
12.089V 5.175V 3.269V 5.111V 121.091 44.58°C 230.04V
CL3 0.115A 0A 19.259A 0A 67.389 78.511% 800 12.6 40.68°C 0.707
12.089V 5.026V 3.427V 5.11V 85.833 43.78°C 230.05V
CL4 70.833A 0A 0A 0A 849.729 92.725% 1704 36.4 45.24°C 0.993
11.996V 5.011V 3.248V 5.074V 916.399 47.65°C 229.95V

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 1.233A 0.495A 0.501A 0.196A 20.005 70.785% 0 <6.0 48.74°C 0.742
12.050V 5.052V 3.293V 5.112V 28.261 36.27°C 114.94V
38W 2.522A 0.693A 0.701A 0.294A 37.771 77.411% 0 <6.0 51.17°C 0.867
12.056V 5.052V 3.294V 5.106V 48.793 37.54°C 114.94V
60W 4.194A 0.891A 0.902A 0.392A 59.998 80.684% 449 7.3 38.19°C 0.914
12.048V 5.051V 3.293V 5.1V 74.362 44.75°C 114.95V
80W 5.674A 1.089A 1.102A 0.491A 79.954 85.523% 664 6.7 39.65°C 0.934
12.044V 5.052V 3.293V 5.094V 93.488 43.42°C 114.94V

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 1.228A 0.495A 0.501A 0.196A 20.002 71.682% 0 <6.0 46.65°C 0.36
12.099V 5.05V 3.293V 5.112V 27.904 36.19°C 230.07V
40W 2.703A 0.693A 0.701A 0.294A 40.001 78.794% 0 <6.0 45.31°C 0.54
12.095V 5.051V 3.293V 5.106V 50.767 37.93°C 230.08V
60W 4.179A 0.891A 0.902A 0.392A 60 81.963% 214 <6.0 38.39°C 0.659
12.091V 5.051V 3.292V 5.1V 73.204 42.68°C 230.09V
80W 5.652A 1.089A 1.103A 0.491A 79.962 87.14% 204 <6.0 39.16°C 0.725
12.088V 5.052V 3.292V 5.094V 91.763 42.23°C 230.09V

The results above are not used in the certification process

Ripple Measurements

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 16.08mV 13.06mV 9.61mV 13.25mV Pass
20% Load 16.33mV 15.86mV 11.19mV 14.67mV Pass
30% Load 18.22mV 16.78mV 12.77mV 16.91mV Pass
40% Load 20.30mV 17.50mV 13.28mV 16.00mV Pass
50% Load 22.44mV 19.28mV 14.65mV 16.56mV Pass
60% Load 25.54mV 19.28mV 15.67mV 17.32mV Pass
70% Load 26.36mV 20.45mV 16.89mV 18.39mV Pass
80% Load 29.66mV 21.52mV 19.43mV 19.61mV Pass
90% Load 32.21mV 23.92mV 20.95mV 21.09mV Pass
100% Load 35.98mV 27.29mV 22.58mV 21.86mV Pass
110% Load 39.23mV 28.06mV 25.99mV 22.57mV Pass
Crossload1 17.54mV 24.99mV 24.31mV 18.44mV Pass
Crossload2 16.39mV 16.47mV 11.49mV 15.85mV Pass
Crossload3 15.98mV 15.25mV 17.75mV 15.64mV Pass
Crossload4 35.36mV 23.51mV 17.95mV 24.40mV Pass

The results above are not used in the certification process

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 14.81mV 17.34mV 9.16mV 12.63mV Pass
20% Load 15.52mV 13.87mV 10.63mV 13.81mV Pass
30% Load 16.54mV 15.31mV 11.70mV 15.08mV Pass
40% Load 19.44mV 15.30mV 12.71mV 16.10mV Pass
50% Load 21.32mV 16.73mV 14.44mV 16.00mV Pass
60% Load 24.63mV 17.55mV 15.46mV 16.61mV Pass
70% Load 27.84mV 18.01mV 16.28mV 17.32mV Pass
80% Load 27.12mV 19.59mV 19.43mV 18.49mV Pass
90% Load 31.04mV 22.14mV 21.01mV 19.82mV Pass
100% Load 35.11mV 25.15mV 21.97mV 20.68mV Pass
110% Load 38.47mV 26.37mV 24.26mV 22.32mV Pass
Crossload1 15.06mV 14.48mV 15.05mV 15.34mV Pass
Crossload2 16.03mV 15.30mV 11.14mV 15.13mV Pass
Crossload3 14.50mV 13.98mV 17.80mV 14.77mV Pass
Crossload4 34.81mV 20.76mV 18.61mV 23.49mV Pass

The results above are not used in the certification process

Cooler Master MWE Gold 850 V4

Top side
Top side
Power specifications label
Power specifications label
Fan
Fan
PSU Internals
PSU Internals
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