CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Version:00
Asus PRIME 850G
Serial Number-
Lab IDAS85003116
Certification ID263116
  • Test Result Report ID: 26PS3116A
  • Certificate Issue Date: Feb 27, 2026
115V230V
Scheme: ETA-EMI PSU
115V230V
Scheme: LAMBDA PSU
Aristeidis Bitziopoulos, Certification Body General Manager

General Information

DUT Information

BrandAsus
Manufacturer (OEM)CWT (GPX)
SeriesPRIME
Model NumberPRIME-850G
Serial Number-
DUT NotesSome protection features need adjustment.

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)12
Rated Frequency (Hz)47-63
Rated Power (W)850
TypeATX12V
Dimensions (W x H x D)150 x 85 x 150mm
Cooling135mm Dual Ball Bearing Fan (ZFB132512H)
Semi-Passive Operation✗
Cable DesignFully Modular

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202070.52.50.3
Watts11084612.53.6
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 18-20AWG Tinned Copper
4+4 pin EPS12V (650mm+150mm) 1 2 18AWG Tinned Copper
6+2 pin PCIe (600mm) 1 1 18AWG Tinned Copper
6+2 pin PCIe (600mm+150mm) 1 2 18AWG Tinned Copper
12+4 pin PCIe (700mm) (600W) 1 1 16-24AWG Tinned Copper
SATA (400mm+120mm+120mm) 1 3 18AWG Tinned Copper
SATA (400mm+120mm) 1 2 18AWG Tinned Copper
4-pin Molex (400mm+150mm+150mm+150mm) 1 4 18AWG Tinned Copper

Parts Description

General Data
Manufacturer (OEM) CWT
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK-056 (5 Ohm @ 20°C) & Relay
Bridge Rectifier
1x NIUSABOU GBU1506 (1000V, 15A @ 100°C)
APFC MOSFETs
1x CRMicro CRJF99N65G2BF (650V, 20A @ 100°C, Rds(on): 90mOhm)
APFC Boost Diode
1x CRMicro CRXI06D065G2 (650V, 6A @ 167°C)
Bulk Cap(s)
1x Elite (420V, 560uF, 2,000h @ 105°C, PL)
Main Switchers
4x Huajing Discrete Devices CS20N60F (600V, 14A @ 100°C, Rds(on): 0.36Ohm)

APFC Controller

Champion CM6500UNX
Sync Power SPN5003 (reducing no load consumption)
Resonant Controller
Champion CM6901X
Topology Primary Side: APFC, Full-Bridge & LLC converter
Secondary Side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 6x CMR013N045NS
5V & 3.3V DC-DC Converters: 4x UBIQ Semiconductor Corp. QN3107M6N (30V, 74A @ 100°C, Rds(on): 2.6mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering Capacitors

Electrolytic:
3x Elite (4-10000 @ 105°C, EY)
7x Elite (2-5000h @ 105°C, ED)
2x Elite (5000 @ 105°C, PF)
Polymer:
10x Elite, 19x TEAPO
Supervisor IC IN1S429I-DCG
FanPower Switch Unisonic Technologies Co. 2SA928A Transistor
Fan Model ZIC ZFB132512H (135mm, 12V, 0.45A, Double Ball Bearing Fan)
5VSB Circuit
Rectifier
Semi Power ES3GBF (280V, 3A @100°C)
Standby PWM Controller
Power Integrations TNY287PG

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

Performance Summary

Efficiency RatingGOLD
Noise RatingStandard+
Average Efficiency (>1450 load combinations)88.879%
Average Noise Output (>1450 Load Combinations)39.27dBA
Average PF (>1450 Load Combinations)0.979
Efficiency With 10W (≤500W) or 2% (>500W) Load67.307%
Standby Power Consumption0.0356W
12V Ripple (Full Load)28.39mV
5V Ripple (Full Load)17.32mV
3.3V Ripple (Full Load)17.95mV
5VSB Ripple (Full Load)21.53mV
12V Load Regulation1.05%
5V Load Regulation2.03%
3.3V Load Regulation3.45%
5VSB Load Regulation3.58%
Inrush Current33.660A
Efficiency RatingGOLD
Noise RatingStandard+
Average Efficiency (>1450 load combinations)90.733%
Average Noise Output (>1450 Load Combinations)39.06dBA
Average PF (>1450 Load Combinations)0.936
Efficiency With 10W (≤500W) or 2% (>500W) Load67.089%
Standby Power Consumption0.0980W
12V Ripple (Full Load)28.50mV
5V Ripple (Full Load)16.91mV
3.3V Ripple (Full Load)18.05mV
5VSB Ripple (Full Load)21.64mV
12V Load Regulation1.04%
5V Load Regulation2.03%
3.3V Load Regulation3.42%
5VSB Load Regulation3.58%
Inrush Current66.120A
12V Transient Response (200%)11.43V
5V Transient Response (200%)4.994V
3.3V Transient Response (200%)3.144V
5VSB Transient Response (200%)4.935V
Hold-Up Time & Power Ok Signal20.20ms
AC Loss to PWR_OK Hold Up Time18.90ms
PWR_OK Inactive to DC Loss Delay1.30ms
PSU Timings: T1 (20% / 100%)24.0ms23.0ms
PSU Timings: T3 (20% / 100%)128.0ms129.0ms
12V OCP (30.1°C / 42.9°C)89.80A (127.38%), 11.991V86.10A (122.13%), 11.997V
5V OCP (30.1°C / 42.9°C)25.8A (129.00%), 5.108V24.8A (124.00%), 5.112V
3.3V OCP (30.1°C / 42.9°C)29A (145.00%), 3.273V28.2A (141.00%), 3.272V
5VSB OCP (30.1°C / 42.9°C)3.6A (144.00%), 5.021V3.7A (148.00%), 5.011V
OPP (28.39°C / 44.02°C)125.48%118.83%

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)20.2
AC Loss to PWR_OK Hold Up Time (ms)18.9
PWR_OK Inactive to DC Loss Delay (ms)1.3

Vampire Power

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS:
115.03 V
115.01 V
113.85 V
115.05 V
116.15 V
PASS
Mains Frequency:
60.00 Hz
59.93 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 %
0.11 %
N/A
0.15 %
2.00 %
PASS
Real Power:
0.036 W
-0.003 W
N/A
0.070 W
N/A
N/A
Apparent Power:
10.335 W
10.315 W
N/A
10.355 W
N/A
N/A
Power Factor:
0.003
N/A
N/A
N/A
N/A
N/A
Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 230.09 V 230.06 V 227.70 V 230.10 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: 0.098 W 0.058 W N/A 0.177 W N/A N/A
Apparent Power: 33.843 W 33.806 W N/A 33.878 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

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 0.231W 69.759% 0.033
5.129V 0.331W 115.05V
2 0.09A 0.462W 75.034% 0.06
5.128V 0.615W 115.05V
3 0.55A 2.813W 80.21% 0.235
5.114V 3.507W 115.04V
4 1A 5.099W 78.058% 0.306
5.098V 6.532W 115.04V
5 1.5A 7.631W 77.768% 0.342
5.086V 9.812W 115.04V
6 2.5A 12.639W 75.796% 0.376
5.056V 16.675W 115.03V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.231W 56.333% 0.012
5.13V 0.41W 229.94V
2 0.09A 0.462W 66.382% 0.021
5.128V 0.696W 229.99V
3 0.55A 2.813W 76.607% 0.102
5.114V 3.671W 229.99V
4 1A 5.102W 78.706% 0.16
5.101V 6.483W 229.99V
5 1.5A 7.631W 79.069% 0.207
5.087V 9.651W 230V
6 2.5A 12.638W 78.169% 0.264
5.055V 16.167W 229.99V

Protection Features

OCP (Normal @ 30.1°C)12V: 89.80A (127.38%), 11.991V
5V: 25.8A (129.00%), 5.108V
3.3V: 29A (145.00%), 3.273V
5VSB: 3.6A (144.00%), 5.021V
OCP (Hot @ 42.9°C)12V: 86.10A (122.13%), 11.997V
5V: 24.8A (124.00%), 5.112V
3.3V: 28.2A (141.00%), 3.272V
5VSB: 3.7A (148.00%), 5.011V
OPP (Normal @ 28.4°C)1066.56W (125.48%)
OPP (Hot @ 44.0°C)1010.09W (118.83%)
OTP✗ (170°C @ 12V Heatsink) *12V Stays ON
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% 5.244A 1.94A 1.992A 0.983A 85.006 87.414% 785 23.2 40.2°C 0.956
12.092V 5.155V 3.313V 5.088V 97.244 41.82°C 115.01V
20% 11.511A 2.917A 2.999A 1.183A 169.951 90.559% 787 23.2 40.94°C 0.976
12.079V 5.143V 3.302V 5.072V 187.668 43°C 114.98V
30% 18.141A 3.409A 3.508A 1.385A 254.961 91.173% 789 23.2 41.38°C 0.98
12.067V 5.134V 3.292V 5.055V 279.646 44.84°C 114.95V
40% 24.791A 3.902A 4.021A 1.588A 340.056 91.217% 790 23.3 41.89°C 0.981
12.055V 5.126V 3.283V 5.039V 372.798 46.55°C 114.92V
50% 31.091A 4.887A 5.043A 1.793A 424.898 90.739% 793 23.4 42.12°C 0.98
12.042V 5.116V 3.272V 5.021V 468.263 49.06°C 114.9V
60% 37.377A 5.876A 6.074A 1.999A 509.417 90.137% 795 23.5 42.66°C 0.981
12.029V 5.106V 3.261V 5.005V 565.156 52.1°C 114.86V
70% 43.745A 6.871A 7.113A 2.206A 594.733 89.258% 1272 37.7 43.45°C 0.983
12.016V 5.095V 3.248V 4.986V 666.307 53.18°C 114.83V
80% 50.128A 7.869A 8.16A 2.313A 679.548 88.28% 1847 46.3 43.84°C 0.984
12.003V 5.082V 3.235V 4.973V 769.764 52.32°C 114.79V
90% 56.926A 8.377A 8.68A 2.42A 764.98 87.393% 2240 51 44.88°C 0.986
11.989V 5.072V 3.226V 4.959V 875.334 52.86°C 114.76V
100% 63.668A 8.887A 9.237A 2.528A 849.679 86.485% 2230 51.1 45.75°C 0.987
11.976V 5.063V 3.215V 4.944V 982.457 55.32°C 114.72V
110% 70.170A 9.896A 10.401A 2.535A 935.073 85.255% 2227 51 47.43°C 0.988
11.961V 5.052V 3.202V 4.932V 1096.798 59.67°C 114.68V
CL1 0.116A 12.945A 13.411A 0A 111.299 82.236% 800 23.8 41.01°C 0.97
12.077V 5.113V 3.259V 5.098V 135.346 51.26°C 115V
CL2 0.116A 19.505A 0A 0A 101.369 80.364% 807 24 40.98°C 0.97
12.085V 5.125V 3.3V 5.106V 126.136 49.53°C 115V
CL3 0.116A 0A 20.267A 0A 67.401 75.062% 787 23.2 41.62°C 0.956
12.084V 5.138V 3.257V 5.106V 89.795 48.63°C 115.01V
CL4 70.879A 0A 0A 0A 849.537 87.377% 2251 50.9 45.63°C 0.987
11.986V 5.105V 3.262V 5.035V 972.272 54.65°C 114.73V

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% 5.244A 1.94A 1.991A 0.983A 85.004 88.098% 788 23.2 40.23°C 0.816
12.092V 5.155V 3.314V 5.088V 96.488 41.84°C 229.99V
20% 11.511A 2.916A 2.998A 1.183A 169.947 91.665% 789 23.2 40.73°C 0.906
12.080V 5.143V 3.303V 5.073V 185.398 42.88°C 229.97V
30% 18.139A 3.409A 3.507A 1.385A 254.956 92.636% 791 23.3 41.15°C 0.935
12.068V 5.134V 3.294V 5.056V 275.225 44.03°C 229.96V
40% 24.788A 3.902A 4.019A 1.588A 340.048 92.788% 792 23.4 41.75°C 0.947
12.056V 5.126V 3.285V 5.039V 366.478 45.63°C 229.94V
50% 31.086A 4.887A 5.041A 1.793A 424.881 92.637% 793 23.4 42.12°C 0.953
12.043V 5.116V 3.274V 5.022V 458.652 47.17°C 229.93V
60% 37.370A 5.877A 6.07A 1.998A 509.4 92.262% 796 23.6 42.66°C 0.957
12.031V 5.106V 3.262V 5.005V 552.124 49.46°C 229.91V
70% 43.736A 6.872A 7.107A 2.206A 594.72 91.686% 1251 37.2 43.17°C 0.962
12.018V 5.094V 3.251V 4.987V 648.65 50.22°C 229.9V
80% 50.118A 7.869A 8.151A 2.312A 679.534 91.027% 1826 46.1 43.61°C 0.965
12.004V 5.082V 3.239V 4.973V 746.52 49.42°C 229.88V
90% 56.914A 8.378A 8.673A 2.42A 764.966 90.439% 2243 51 44.72°C 0.967
11.991V 5.072V 3.228V 4.96V 845.835 50.51°C 229.87V
100% 63.656A 8.887A 9.231A 2.529A 849.666 89.885% 2231 51.1 45.5°C 0.969
11.978V 5.063V 3.217V 4.944V 945.287 52.68°C 229.85V
110% 70.155A 9.897A 10.392A 2.535A 935.05 89.196% 2227 51 47.16°C 0.971
11.963V 5.051V 3.204V 4.931V 1048.317 55.01°C 229.84V
CL1 0.116A 12.944A 13.395A 0A 111.297 83.191% 801 23.8 40.53°C 0.87
12.077V 5.113V 3.263V 5.099V 133.789 49.45°C 229.98V
CL2 0.116A 19.503A 0A 0A 101.365 81.194% 808 24.1 40.94°C 0.861
12.086V 5.126V 3.3V 5.106V 124.842 48.82°C 229.99V
CL3 0.115A 0A 20.234A 0A 67.4 75.747% 785 23.2 40.96°C 0.799
12.084V 5.138V 3.262V 5.107V 88.981 47.5°C 229.99V
CL4 70.866A 0A 0A 0A 849.523 90.816% 2250 50.9 45.25°C 0.969
11.988V 5.105V 3.262V 5.035V 935.443 51.29°C 229.86V

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 1.228A 0.484A 0.496A 0.195A 20.002 70.348% 777 23 36.58°C 0.83
12.101V 5.166V 3.326V 5.121V 28.433 37.58°C 115.03V
40W 2.702A 0.678A 0.695A 0.293A 40.002 80.844% 779 23.1 37.29°C 0.916
12.099V 5.163V 3.323V 5.115V 49.481 38.11°C 115.03V
60W 4.178A 0.872A 0.894A 0.391A 60.002 85.34% 781 23.2 38.28°C 0.952
12.096V 5.16V 3.32V 5.11V 70.309 39.54°C 115.02V
80W 5.650A 1.066A 1.094A 0.49A 79.951 87.382% 783 23.2 39.33°C 0.955
12.094V 5.158V 3.318V 5.104V 91.496 40.73°C 115.02V

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 0.484A 0.496A 0.195A 20.002 70.376% 782 23.2 36.61°C 0.483
12.102V 5.166V 3.327V 5.121V 28.422 38.46°C 230V
40W 2.702A 0.678A 0.695A 0.293A 40 81.316% 783 23.2 37.57°C 0.649
12.099V 5.164V 3.324V 5.115V 49.192 39.18°C 229.99V
60W 4.178A 0.872A 0.894A 0.391A 59.999 85.856% 784 23.2 38.5°C 0.742
12.096V 5.16V 3.321V 5.11V 69.883 39.7°C 229.99V
80W 5.649A 1.066A 1.094A 0.49A 79.946 88.14% 785 23.2 39.04°C 0.802
12.094V 5.158V 3.319V 5.105V 90.704 40.67°C 229.99V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load23.74mV15.02mV14.99mV14.78mVPass
20% Load26.76mV15.07mV15.24mV19.75mVPass
30% Load29.62mV14.66mV15.04mV21.18mVPass
40% Load29.93mV15.17mV15.30mV19.13mVPass
50% Load25.79mV15.84mV17.85mV24.60mVPass
60% Load24.40mV15.43mV15.86mV17.59mVPass
70% Load24.92mV15.48mV16.73mV22.10mVPass
80% Load26.35mV16.20mV16.63mV22.71mVPass
90% Load27.06mV16.71mV17.24mV20.20mVPass
100% Load28.39mV17.32mV17.95mV21.53mVPass
110% Load29.78mV17.37mV18.16mV23.02mVPass
Crossload129.06mV16.96mV17.65mV13.76mVPass
Crossload226.09mV20.33mV16.27mV15.04mVPass
Crossload324.09mV16.86mV20.92mV14.07mVPass
Crossload429.11mV15.79mV15.34mV16.68mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load21.95mV14.87mV15.45mV14.68mVPass
20% Load26.25mV14.20mV14.94mV19.08mVPass
30% Load28.80mV14.82mV15.30mV18.01mVPass
40% Load29.36mV14.30mV15.50mV17.75mVPass
50% Load25.27mV15.53mV15.50mV23.07mVPass
60% Load24.40mV15.23mV15.70mV17.49mVPass
70% Load23.99mV15.58mV16.06mV21.84mVPass
80% Load26.25mV15.79mV24.76mV21.49mVPass
90% Load27.27mV16.61mV16.78mV21.43mVPass
100% Load28.50mV16.91mV18.05mV21.64mVPass
110% Load29.21mV17.06mV19.13mV23.33mVPass
Crossload127.73mV15.94mV18.52mV13.71mVPass
Crossload226.81mV19.82mV16.57mV15.24mVPass
Crossload325.07mV16.35mV28.14mV14.73mVPass
Crossload427.99mV16.25mV15.91mV17.29mVPass

The results above are not used in the certification process

Asus PRIME 850G

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
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