CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Version:00
FSP Technology MEGA GM 850W
Serial NumberS5020130001
Lab IDFS85002981
Certification ID252981
  • Test Result Report ID: 25PS2981A
  • Certificate Issue Date: Sep 29, 2025
115V230V
Scheme: ETA-EMI PSU
115V230V
Scheme: LAMBDA PSU
Outside Validation Scope
Aristeidis Bitziopoulos, Certification Body General Manager

General Information

DUT Information

BrandFSP Technology
Manufacturer (OEM)FSP
SeriesMEGA GM
Model NumberMEGA-850GM
Serial NumberS5020130001
DUT Notes

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)5.5-11
Rated Frequency (Hz)50-60
Rated Power (W)850
TypeATX12V
Dimensions (W x H x D)
Cooling135mm Hydro Dynamic Bearing Fan (PLA13525S12M)
Semi-Passive Operation✓ (selectable)
Cable DesignFully Modular

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202070.8330.3
Watts120850153.6
Total Max. Power (W)850

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

Cables and Connectors(Non-accredited measurements)

Modular Cables
Description Cable Count Connector Count (Total) Gauge Cable Type
ATX connector 20+4 pin (600mm) 1 1 16-22AWG Tinned Copper
4+4 pin ATX12V (700mm) 2 2 16AWG Tinned Copper
6+2 pin PCIe (650mm) 3 3 16AWG Tinned Copper
12+4 pin PCIe (700mm) (600W) 1 1 16-24AWG Tinned Copper
SATA (500mm+155mm+155mm+155mm) 2 8 18AWG Tinned Copper
SATA (500mm+155mm) / 4-pin Molex (+155mm+155mm) 1 2 / 2 18AWG Tinned Copper
4-pin Molex (500mm+155mm+155mm+155mm) 1 4 18AWG Tinned Copper

Parts Description

General Data
Manufacturer (OEM) FSP
PCB Type Double-Sided
Primary Side
Transient Filter 2x Y caps,3x X caps, 2x CM chokes, 1x MOV
Inrush Protection NTC Thermistor SCK-056 (5 Ohm @ 25°C) & Relay
Bridge Rectifier
2x HY Electronic GBJ2506 (600V, 25A @ 25°C)
APFC MOSFETs
2x Alpha & Omega AOTF160A60L (600V, 15A @ 100°C, Rds(on): 0.16Ohm)
APFC Boost Diode
STMicroelectronics STPSC6H065 (650V, 6A @ 110°C)
Bulk Cap(s)
2x Nippon Chemi-Con (420V, 330uF each or 660uF combined, 2000h @ 105°C, KMR)
Main Switchers
2x STMicroelectronics STF28N60M2 (650V, 14A @ 100°C, Rds(on): 0.150Ohm)

APFC Controller

Infineon ICE2PCS02G
Resonant Controller
Champion CM6901T2X
IC Driver Novosense NSI6602
Topology Primary side: APFC, Half-Bridge & LLC Resonant Converter
Secondary side: [12V] Synchronous Rectification & [Minor Rails] DC-DC converters
Secondary Side
+12V MOSFETs 4x CMR014N04N
5V & 3.3V DC-DC Converters: 6x XSEMI XP3R303GMT (30V, 25 @ 70°C, Rds(on): 3.3mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering Capacitors

Electrolytic:
4x Nippon Chemi-Con (2-5,000 @ 105°C, KZE)
6x Rubycon (6-10,000 @ 105°C, ZLH)
Polymer:
35x Nippon Chemi-Con, 3x FPCAP
Supervisor IC Weltrend WT7527RA (OVP, UVP, OCP, PG)
Fan Controller ANPEC APW9010
Fan Model Power Logic PLA13525S12M (135mm, 12V, 0.4A, Hydro Dynamic Bearing Fan)
5VSB Circuit
Rectifier
PFC Device Corporation P15L50SP (50V, 15A)
Standby PWM Controller
Nexperia PSMN2R4-30YLD (30V, 100A @ 25°C, Rds(on): 2.4mOhm)

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✓
Commission Regulation (EU) No 617/2013 Testing✓

Performance Summary

Efficiency RatingPLATINUM
Noise RatingA++
Average Efficiency (>1450 load combinations)90.259%
Average Noise Output (>1450 Load Combinations)7.66dBA
Average PF (>1450 Load Combinations)0.984
Efficiency With 10W (≤500W) or 2% (>500W) Load71.234%
Standby Power Consumption0.0656W
12V Ripple (Full Load)34.30mV
5V Ripple (Full Load)27.74mV
3.3V Ripple (Full Load)24.87mV
5VSB Ripple (Full Load)30.51mV
12V Load Regulation0.50%
5V Load Regulation0.33%
3.3V Load Regulation0.39%
5VSB Load Regulation4.17%
Inrush Current32.940A
Efficiency RatingPLATINUM
Noise RatingA++
Average Efficiency (>1450 load combinations)92.265%
Average Noise Output (>1450 Load Combinations)7.41dBA
Average PF (>1450 Load Combinations)0.959
Efficiency With 10W (≤500W) or 2% (>500W) Load71.877%
Standby Power Consumption0.1044W
12V Ripple (Full Load)32.38mV
5V Ripple (Full Load)21.67mV
3.3V Ripple (Full Load)20.74mV
5VSB Ripple (Full Load)26.74mV
12V Load Regulation0.56%
5V Load Regulation0.39%
3.3V Load Regulation0.45%
5VSB Load Regulation4.23%
Inrush Current65.730A
12V Transient Response (200%)11.59V
5V Transient Response (200%)5.028V
3.3V Transient Response (200%)3.227V
5VSB Transient Response (200%)5.036V
Hold-Up Time & Power Ok Signal20.60ms
AC Loss to PWR_OK Hold Up Time18.30ms
PWR_OK Inactive to DC Loss Delay2.30ms
PSU Timings: T1 (20% / 100%)66.0ms46.0ms
PSU Timings: T3 (20% / 100%)127.0ms123.0ms
12V OCP (32.0°C / 44.1°C)101.40A (143.16%), 12.068V101.40A (143.16%), 12.077V
5V OCP (32.0°C / 44.1°C)24.2A (121.00%), 5.083V23.5A (117.50%), 5.087V
3.3V OCP (32.0°C / 44.1°C)28.3A (141.50%), 3.335V27.8A (139.00%), 3.338V
5VSB OCP (32.0°C / 44.1°C)3.6A (120.00%), 4.916V3.6A (120.00%), 4.915V
OPP (31.98°C / 42.78°C)142.67%142.67%

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)20.6
AC Loss to PWR_OK Hold Up Time (ms)18.3
PWR_OK Inactive to DC Loss Delay (ms)2.3

Vampire Power

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 114.95 V 114.94 V 113.85 V 114.97 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 1.416 1.490 PASS
Mains Voltage THD: 0.13 % 0.10 % N/A 0.17 % 2.00 % PASS
Real Power: 0.066 W 0.043 W N/A 0.091 W N/A N/A
Apparent Power: 8.400 W 8.377 W N/A 8.422 W N/A N/A
Power Factor: 0.007 N/A N/A N/A N/A N/A
Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 229.90 V 229.89 V 227.70 V 229.93 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: 0.15 % 0.13 % N/A 0.16 % 2.00 % PASS
Real Power: 0.104 W 0.059 W N/A 0.194 W N/A N/A
Apparent Power: 27.396 W 27.357 W N/A 27.439 W N/A N/A
Power Factor: 0.002 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 65.943% 0.043
5.098V 0.349W 115.04V
2 0.09A 0.459W 74.036% 0.074
5.096V 0.62W 115.04V
3 0.55A 2.791W 80.119% 0.252
5.073V 3.483W 115.04V
4 1A 5.052W 80.07% 0.309
5.051V 6.309W 115.04V
5 1.5A 7.541W 79.694% 0.34
5.027V 9.463W 115.04V
6 3A 14.853W 76.708% 0.376
4.951V 19.363W 115.03V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.23W 57.762% 0.015
5.101V 0.399W 229.99V
2 0.09A 0.459W 68.304% 0.025
5.097V 0.673W 229.99V
3 0.55A 2.79W 78.281% 0.119
5.073V 3.564W 230V
4 1A 5.051W 78.829% 0.18
5.05V 6.409W 230V
5 1.5A 7.539W 78.952% 0.224
5.025V 9.55W 229.99V
6 3A 14.856W 77.924% 0.287
4.952V 19.064W 229.99V

Protection Features

OCP (Normal @ 32.0°C)12V: 101.40A (143.16%), 12.068V
5V: 24.2A (121.00%), 5.083V
3.3V: 28.3A (141.50%), 3.335V
5VSB: 3.6A (120.00%), 4.916V
OCP (Hot @ 44.1°C)12V: 101.40A (143.16%), 12.077V
5V: 23.5A (117.50%), 5.087V
3.3V: 27.8A (139.00%), 3.338V
5VSB: 3.6A (120.00%), 4.915V
OPP (Normal @ 32.0°C)1212.72W (142.67%)
OPP (Hot @ 42.8°C)1212.71W (142.67%)
OTP✓ (98°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% 5.222A 1.957A 1.968A 0.991A 85.014 89.145% 0 <6.0 43.34°C 0.963
12.145V 5.109V 3.354V 5.048V 95.366 40.15°C 115.01V
20% 11.458A 2.937A 2.953A 1.192A 169.978 91.886% 0 <6.0 43.37°C 0.986
12.138V 5.108V 3.353V 5.034V 184.989 40.8°C 114.98V
30% 18.046A 3.427A 3.446A 1.395A 254.987 92.523% 0 <6.0 45.98°C 0.987
12.132V 5.107V 3.353V 5.02V 275.589 41.13°C 114.95V
40% 24.647A 3.918A 3.939A 1.599A 340.069 92.587% 0 <6.0 49.12°C 0.989
12.126V 5.106V 3.351V 5.005V 367.297 41.67°C 114.92V
50% 30.889A 4.898A 4.926A 1.803A 424.882 92.18% 0 <6.0 54.04°C 0.99
12.120V 5.105V 3.35V 4.991V 460.927 42.08°C 114.89V
60% 37.112A 5.879A 5.913A 2A 509.356 91.631% 622 9.8 42.71°C 0.989
12.114V 5.104V 3.349V 4.978V 555.888 63.06°C 114.86V
70% 43.414A 6.864A 6.903A 2.218A 594.712 91.037% 628 10.1 43.17°C 0.988
12.107V 5.1V 3.347V 4.96V 653.263 61.86°C 114.83V
80% 49.724A 7.845A 7.893A 2.322A 679.53 90.103% 673 12.4 43.76°C 0.986
12.100V 5.098V 3.345V 4.952V 754.175 63.87°C 114.8V
90% 56.435A 8.337A 8.374A 2.428A 764.95 89.287% 932 24 44.03°C 0.983
12.093V 5.096V 3.344V 4.943V 856.737 65.59°C 114.77V
100% 62.895A 8.832A 8.887A 3.066A 849.759 88.342% 1268 33.7 45.95°C 0.978
12.085V 5.094V 3.342V 4.893V 961.895 65.43°C 114.73V
110% 69.234A 9.819A 9.971A 3.066A 934.336 87.297% 1588 40.6 45.82°C 0.973
12.076V 5.091V 3.34V 4.893V 1070.302 65.41°C 114.7V
CL1 0.116A 14.171A 14.264A 0A 121.293 84.678% 626 9.9 41.28°C 0.977
12.142V 5.094V 3.344V 5.147V 143.24 57.08°C 114.99V
CL2 0.115A 19.634A 0A 0A 101.363 83.741% 621 9.8 41.44°C 0.973
12.146V 5.092V 3.355V 5.16V 121.044 53.27°C 115V
CL3 0.114A 0A 19.739A 0A 67.4 79.2% 620 9.8 41.31°C 0.96
12.145V 5.112V 3.344V 5.117V 85.101 50.93°C 115.02V
CL4 70.277A 0A 0A 0.002A 849.54 89.275% 742 15.9 45.38°C 0.98
12.089V 5.108V 3.35V 5.1V 951.605 62.98°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% 5.219A 1.956A 1.967A 0.99A 85.008 90.357% 0 <6.0 49.12°C 0.849
12.150V 5.112V 3.356V 5.049V 94.082 40.25°C 229.98V
20% 11.452A 2.935A 2.951A 1.192A 169.957 93.196% 0 <6.0 49.21°C 0.937
12.143V 5.11V 3.355V 5.036V 182.365 40.64°C 229.97V
30% 18.039A 3.426A 3.445A 1.394A 254.971 93.968% 0 <6.0 49.49°C 0.961
12.136V 5.109V 3.353V 5.021V 271.339 41.25°C 229.95V
40% 24.639A 3.916A 3.938A 1.598A 340.061 94.148% 0 <6.0 52.52°C 0.972
12.130V 5.108V 3.353V 5.006V 361.197 41.69°C 229.94V
50% 30.881A 4.897A 4.925A 1.803A 424.876 93.931% 0 <6.0 55.08°C 0.976
12.123V 5.106V 3.351V 4.991V 452.328 42.12°C 229.92V
60% 37.109A 5.879A 5.913A 2A 509.351 93.643% 628 10.1 42.77°C 0.977
12.115V 5.103V 3.349V 4.976V 543.93 54.04°C 229.9V
70% 43.421A 6.865A 6.905A 2.218A 594.721 93.315% 629 10.1 43.37°C 0.978
12.105V 5.1V 3.346V 4.959V 637.328 52.89°C 229.89V
80% 49.730A 7.845A 7.893A 2.322A 679.541 92.597% 680 13 43.69°C 0.979
12.098V 5.097V 3.345V 4.952V 733.868 54.38°C 229.87V
90% 56.445A 8.338A 8.375A 2.428A 764.964 92.131% 866 21.3 44.4°C 0.977
12.091V 5.096V 3.343V 4.943V 830.302 53.8°C 229.86V
100% 62.906A 8.833A 8.888A 3.065A 849.777 91.571% 1174 31.4 45.62°C 0.974
12.083V 5.094V 3.342V 4.894V 928.001 52.1°C 229.84V
110% 69.245A 9.82A 9.972A 3.066A 934.344 90.986% 1503 38.7 46.21°C 0.973
12.074V 5.091V 3.339V 4.893V 1026.914 51.56°C 229.83V
CL1 0.116A 14.171A 14.265A 0A 121.295 86.176% 627 9.9 41.53°C 0.914
12.141V 5.094V 3.344V 5.146V 140.753 50.54°C 229.97V
CL2 0.115A 19.634A 0A 0A 101.366 84.925% 622 9.8 41.9°C 0.893
12.146V 5.092V 3.355V 5.16V 119.359 49.15°C 229.97V
CL3 0.114A 0A 19.74A 0A 67.401 80.264% 620 9.8 41.11°C 0.831
12.146V 5.112V 3.344V 5.117V 83.973 47.61°C 229.98V
CL4 70.284A 0A 0A 0.002A 849.545 92.394% 745 16 45.69°C 0.975
12.088V 5.108V 3.35V 5.1V 919.484 52.94°C 229.84V

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 1.223A 0.489A 0.492A 0.196A 20.003 74% 0 <6.0 37.2°C 0.861
12.145V 5.109V 3.354V 5.097V 27.031 36.23°C 115.03V
40W 2.692A 0.685A 0.689A 0.295A 40.006 83.605% 0 <6.0 39.17°C 0.927
12.145V 5.11V 3.355V 5.093V 47.851 37.7°C 115.02V
60W 4.161A 0.881A 0.885A 0.393A 60.008 87.3% 0 <6.0 40.41°C 0.948
12.145V 5.111V 3.355V 5.087V 68.737 38.95°C 115.02V
80W 5.626A 1.076A 1.082A 0.492A 79.966 89.283% 0 <6.0 43.3°C 0.96
12.145V 5.111V 3.355V 5.081V 89.565 39.25°C 115.01V

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 1.224A 0.489A 0.492A 0.196A 20.005 74.935% 0 <6.0 38.63°C 0.534
12.139V 5.112V 3.356V 5.101V 26.697 36.04°C 229.99V
40W 2.690A 0.685A 0.688A 0.294A 40.003 84.707% 0 <6.0 40.82°C 0.711
12.151V 5.113V 3.357V 5.096V 47.226 37.53°C 229.99V
60W 4.159A 0.88A 0.885A 0.393A 60.003 88.571% 0 <6.0 44.96°C 0.792
12.150V 5.113V 3.357V 5.089V 67.745 38.21°C 229.98V
80W 5.624A 1.076A 1.081A 0.492A 79.953 90.342% 0 <6.0 46.68°C 0.84
12.149V 5.114V 3.357V 5.083V 88.501 39.11°C 229.98V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load25.07mV16.61mV16.98mV16.11mVPass
20% Load26.35mV16.86mV17.03mV16.83mVPass
30% Load26.29mV16.61mV16.27mV16.98mVPass
40% Load27.93mV17.32mV16.98mV19.23mVPass
50% Load29.93mV19.16mV18.98mV21.18mVPass
60% Load30.13mV19.31mV19.75mV22.40mVPass
70% Load31.87mV21.10mV18.83mV25.17mVPass
80% Load33.51mV20.49mV20.62mV25.06mVPass
90% Load33.10mV22.17mV22.10mV27.72mVPass
100% Load34.30mV27.74mV24.87mV30.51mVPass
110% Load36.14mV27.23mV26.19mV34.88mVPass
Crossload126.66mV18.51mV17.66mV16.79mVPass
Crossload225.79mV18.85mV17.04mV17.49mVPass
Crossload324.81mV16.45mV20.56mV16.22mVPass
Crossload434.10mV23.68mV21.27mV28.61mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load25.02mV17.01mV16.42mV16.11mVPass
20% Load25.38mV16.86mV16.32mV16.42mVPass
30% Load25.48mV17.22mV16.27mV18.01mVPass
40% Load26.86mV17.98mV18.01mV19.79mVPass
50% Load27.47mV18.09mV17.96mV20.77mVPass
60% Load28.86mV19.16mV18.01mV22.25mVPass
70% Load31.41mV19.21mV18.93mV24.04mVPass
80% Load31.26mV20.84mV19.64mV24.35mVPass
90% Load31.26mV20.79mV20.26mV25.98mVPass
100% Load32.38mV21.67mV20.74mV26.74mVPass
110% Load33.30mV21.96mV19.79mV28.34mVPass
Crossload125.43mV18.04mV16.59mV17.27mVPass
Crossload226.09mV19.00mV17.14mV16.78mVPass
Crossload325.32mV17.98mV19.23mV17.04mVPass
Crossload434.14mV21.09mV19.74mV26.57mVPass

The results above are not used in the certification process

FSP Technology MEGA GM 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