CYBENETICS LTD Syrou 6, Latsia, 2231, Nicosia Cyprus
Cooler Master GX III 750 Gold
Serial Number
Lab IDCM75002433
  • Report: 24PS2433A
  • Receipt Date: Apr 9, 2024
  • Test Date: May 3, 2024
  • Report Date: May 8, 2024
115V230V
Efficiency Rating
115V230V
Noise Rating
Aristeidis Bitziopoulos, Lab Director

General Information

DUT Information

BrandCooler Master
Manufacturer (OEM)Lite-On
SeriesGX III
Model NumberMPX-7503-AFAG
Serial Number
DUT Notes

DUT Specifications

Rated Voltage (Vrms)100-240
Rated Current (Arms)10-5
Rated Frequency (Hz)50-60
Rated Power (W)750
TypeATX12V
Cooling135mm Fluid Dynamic Bearing Fan
(HA13525H12F-Z)
Semi-Passive Operation✓
Cable DesignFully Modular

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202062.530.3
Watts120750153.6
Total Max. Power (W)750

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, N4L PPA1530, N4L PPA5530
Oscilloscopes Picoscope 4444, Rigol DS7014, 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, Keithley 2015 - THD
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 (610mm) 1 1 18-22AWG No
4+4 pin EPS12V (600mm) 1 1 18AWG No
8 pin EPS12V (600mm) 1 1 18AWG No
6+2 pin PCIe (550mm) 3 3 16-18AWG No
12+4 pin PCIe (650mm) (450W) 1 1 16-28AWG No
SATA (500mm+120mm+120mm+120mm) 2 8 20AWG No
4-pin Molex (500mm+120mm+120mm+120mm) 1 4 20AWG No
AC Power Cord (1360mm) - 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)89.904%
Average Noise Output (>1450 Load Combinations)29.52dBA
Average PF (>1450 Load Combinations)0.993
Efficiency With 10W (≤500W) or 2% (>500W) Load79.730%
Standby Power Consumption0.0905W
12V Ripple (Full Load)45.37mV
5V Ripple (Full Load)18.33mV
3.3V Ripple (Full Load)17.90mV
5VSB Ripple (Full Load)15.56mV
12V Load Regulation0.87%
5V Load Regulation2.28%
3.3V Load Regulation3.18%
5VSB Load Regulation4.80%
Inrush Current64.040A
Efficiency RatingPLATINUM
Noise RatingA-
Average Efficiency (>1450 load combinations)91.809%
Average Noise Output (>1450 Load Combinations)29.34dBA
Average PF (>1450 Load Combinations)0.981
Efficiency With 10W (≤500W) or 2% (>500W) Load0.000%
Standby Power Consumption0.1274W
12V Ripple (Full Load)46.55mV
5V Ripple (Full Load)17.82mV
3.3V Ripple (Full Load)17.80mV
5VSB Ripple (Full Load)13.95mV
12V Load Regulation0.85%
5V Load Regulation2.28%
3.3V Load Regulation2.18%
5VSB Load Regulation4.85%
Inrush Current49.000A
12V Transient Response (200%)11.19V
5V Transient Response (200%)4.823V
3.3V Transient Response (200%)3.231V
5VSB Transient Response (200%)4.933V
Hold-Up Time & Power Ok Signal29.20ms
AC Loss to PWR_OK Hold Up Time25.00ms
PWR_OK Inactive to DC Loss Delay4.20ms
PSU Timings: T1 (20% / 100%)43.0ms57.0ms
PSU Timings: T3 (20% / 100%)125.0ms126.0ms
OPP (28.35°C / 41.21°C)135.56%128.09%

Hold-Up Time & Power Ok Signal

Hold-Up Time (ms)29.2
AC Loss to PWR_OK Hold Up Time (ms)25
PWR_OK Inactive to DC Loss Delay (ms)4.2

Vampire Power

Tables

Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 114.85 V 114.79 V 113.85 V 114.91 V 116.15 V PASS
Mains Frequency: 60.00 Hz 59.99 Hz 59.40 Hz 60.02 Hz 60.60 Hz PASS
Mains Voltage CF: 1.420 1.418 1.340 1.422 1.490 PASS
Mains Voltage THD: 0.15 % 0.10 % N/A 0.28 % 2.00 % PASS
Real Power: 0.090 W 0.080 W N/A 0.101 W N/A N/A
Apparent Power: 7.444 W 7.428 W N/A 7.461 W N/A N/A
Power Factor: 0.012 N/A N/A N/A N/A N/A
Detailed Results
Average Min Limit Min Max Limit Max Result
Mains Voltage RMS: 229.87 V 229.77 V 227.70 V 229.92 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: 1.419 1.418 1.340 1.420 1.490 PASS
Mains Voltage THD: 0.13 % 0.09 % N/A 0.19 % 2.00 % PASS
Real Power: 0.127 W 0.105 W N/A 0.153 W N/A N/A
Apparent Power: 25.355 W 25.336 W N/A 25.378 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

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 63.838% 0.048
5.138V 0.362W 114.84V
2 0.09A 0.462W 73.316% 0.082
5.136V 0.63W 114.85V
3 0.55A 2.813W 82.996% 0.305
5.115V 3.389W 114.85V
4 1A 5.094W 82.557% 0.393
5.094V 6.171W 114.83V
5 1.5A 7.607W 82.306% 0.432
5.071V 9.243W 114.84V
6 3A 14.997W 80.296% 0.485
4.999V 18.678W 114.83V
Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.045A 0.231W 56.638% 0.016
5.139V 0.409W 229.85V
2 0.09A 0.462W 67.812% 0.027
5.136V 0.682W 229.85V
3 0.55A 2.813W 81.506% 0.127
5.115V 3.451W 229.84V
4 1A 5.094W 82.66% 0.203
5.094V 6.163W 229.85V
5 1.5A 7.607W 82.585% 0.266
5.071V 9.212W 229.84V
6 3A 15.003W 81.444% 0.362
5.001V 18.421W 229.84V

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% 4.464A 1.975A 1.963A 0.984A 75.008 89.739% 0 <6.0 44.57°C 0.974
11.963V 5.064V 3.363V 5.082V 83.619 40.31°C 114.82V
20% 9.960A 2.969A 2.953A 1.185A 149.954 92.465% 0 <6.0 45.26°C 0.988
11.953V 5.053V 3.353V 5.063V 162.228 40.74°C 114.79V
30% 15.816A 3.47A 3.455A 1.388A 224.962 92.753% 0 <6.0 46.45°C 0.993
11.943V 5.044V 3.344V 5.044V 242.529 41.39°C 114.78V
40% 21.692A 3.973A 3.959A 1.593A 300.056 92.255% 924 27.7 41.82°C 0.995
11.933V 5.035V 3.335V 5.024V 325.253 47.34°C 114.75V
50% 27.176A 4.979A 4.966A 1.799A 374.537 91.589% 994 29.5 42.03°C 0.997
11.923V 5.022V 3.323V 5.004V 408.936 48.2°C 114.72V
60% 32.706A 5.99A 5.981A 2A 449.419 90.916% 1111 32.2 42.68°C 0.997
11.913V 5.009V 3.311V 4.985V 494.33 49.25°C 114.7V
70% 38.246A 7.006A 7.001A 2.216A 524.356 90.087% 1262 35.2 43.2°C 0.997
11.903V 4.997V 3.3V 4.964V 581.024 50.23°C 114.49V
80% 43.871A 8.025A 8.028A 2.325A 599.598 89.076% 1523 39.8 43.72°C 0.997
11.892V 4.984V 3.288V 4.948V 673.142 51.73°C 114.64V
90% 49.831A 8.544A 8.539A 2.433A 674.595 88.21% 1698 42.2 44.42°C 0.997
11.882V 4.974V 3.279V 4.933V 764.725 53.5°C 114.62V
100% 55.601A 9.066A 9.086A 3.067A 749.779 87.152% 1928 45.7 45.68°C 0.997
11.871V 4.964V 3.269V 4.892V 860.315 55.77°C 114.58V
110% 61.252A 10.098A 10.224A 3.074A 824.788 85.962% 1986 46.4 46.73°C 0.997
11.860V 4.951V 3.257V 4.88V 959.462 57.56°C 114.56V
CL1 0.116A 14.407A 14.128A 0A 121.291 85.117% 878 26.2 41.84°C 0.985
11.940V 5.012V 3.376V 5.11V 142.497 43.87°C 114.8V
CL2 0.116A 19.904A 0A 0A 101.335 83.556% 0 <6.0 42.68°C 0.982
11.947V 5.021V 3.349V 5.119V 121.284 41.11°C 114.81V
CL3 0.116A 0A 19.337A 0A 67.381 80.684% 889 26.5 40.94°C 0.974
11.947V 5.058V 3.413V 5.119V 83.475 44.11°C 114.82V
CL4 63.040A 0A 0A 0A 749.539 88.304% 1727 42.5 45.38°C 0.997
11.890V 5.009V 3.304V 5.054V 848.799 52.78°C 114.6V

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% 4.464A 1.974A 1.958A 0.984A 75.005 90.912% 0 <6.0 44.51°C 0.93
11.962V 5.065V 3.37V 5.082V 82.554 40.27°C 229.83V
20% 9.959A 2.968A 2.943A 1.185A 149.946 93.623% 0 <6.0 45.15°C 0.971
11.952V 5.054V 3.364V 5.062V 160.19 40.57°C 229.82V
30% 15.816A 3.469A 3.441A 1.388A 224.945 94.066% 0 <6.0 46.25°C 0.981
11.943V 5.045V 3.357V 5.043V 239.144 41.13°C 229.8V
40% 21.686A 3.974A 3.943A 1.593A 300.031 93.805% 846 25.0 41.68°C 0.987
11.935V 5.033V 3.348V 5.024V 319.826 47.24°C 229.79V
50% 27.165A 4.979A 4.939A 1.799A 374.445 93.473% 963 28.9 42.09°C 0.991
11.925V 5.022V 3.341V 5.004V 400.539 48.15°C 229.77V
60% 32.694A 5.989A 5.94A 2A 449.331 92.978% 1093 31.9 42.78°C 0.992
11.915V 5.009V 3.333V 4.984V 483.212 49.38°C 229.77V
70% 38.235A 7.005A 6.946A 2.216A 524.288 92.463% 1237 34.7 43.41°C 0.994
11.905V 4.997V 3.326V 4.964V 567.142 50.49°C 229.76V
80% 43.853A 8.024A 7.955A 2.324A 599.496 91.844% 1418 38.2 43.68°C 0.995
11.894V 4.985V 3.318V 4.948V 652.754 51.69°C 229.74V
90% 49.817A 8.543A 8.457A 2.433A 674.539 91.224% 1645 41.5 44.71°C 0.995
11.885V 4.974V 3.311V 4.932V 739.392 53.89°C 229.73V
100% 55.593A 9.066A 8.994A 3.068A 749.773 90.459% 1887 45.1 45.61°C 0.995
11.873V 4.963V 3.302V 4.89V 828.843 55.74°C 229.72V
110% 61.242A 10.099A 10.106A 3.075A 824.795 89.656% 1992 46.4 46.71°C 0.996
11.863V 4.951V 3.295V 4.879V 919.989 57.57°C 229.7V
CL1 0.116A 14.408A 14.131A 0A 121.299 86.041% 996 29.6 41.29°C 0.967
11.938V 5.011V 3.375V 5.109V 141.097 43.39°C 229.82V
CL2 0.116A 19.908A 0A 0A 101.339 84.247% 856 25.4 41.68°C 0.962
11.947V 5.021V 3.348V 5.118V 120.295 43.15°C 229.82V
CL3 0.116A 0A 19.341A 0A 67.383 82.257% 0 <6.0 42.87°C 0.929
11.948V 5.056V 3.412V 5.119V 82.08 40.34°C 229.83V
CL4 63.046A 0A 0A 0A 749.559 91.448% 1697 42.2 45.3°C 0.995
11.889V 5.009V 3.304V 5.054V 819.601 47.81°C 229.72V

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 1.240A 0.492A 0.489A 0.195A 20.004 81.838% 0 <6.0 39.61°C 0.911
11.974V 5.077V 3.373V 5.127V 24.521 36.54°C 114.83V
40W 2.732A 0.69A 0.685A 0.293A 40.004 87.071% 0 <6.0 40.52°C 0.95
11.970V 5.074V 3.371V 5.12V 45.958 37.23°C 114.83V
60W 4.223A 0.887A 0.882A 0.391A 60.004 89.351% 0 <6.0 42.34°C 0.968
11.967V 5.07V 3.368V 5.113V 67.151 38.79°C 114.82V
80W 5.711A 1.085A 1.079A 0.49A 79.953 91.209% 0 <6.0 43.08°C 0.975
11.964V 5.067V 3.365V 5.106V 87.682 39.11°C 114.82V

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 1.240A 0.493A 0.489A 0.195A 20.001 77.301% 0 <6.0 39.69°C 0.499
11.974V 5.076V 3.374V 5.127V 24.108 36.55°C 229.84V
40W 2.731A 0.69A 0.685A 0.293A 40.001 88.075% 0 <6.0 40.87°C 0.774
11.970V 5.073V 3.373V 5.12V 45.496 37.53°C 229.84V
60W 4.222A 0.887A 0.881A 0.391A 60 90.393% 0 <6.0 42.05°C 0.891
11.967V 5.07V 3.371V 5.113V 66.412 38.5°C 229.82V
80W 5.710A 1.085A 1.077A 0.49A 79.941 92.199% 0 <6.0 43.09°C 0.936
11.965V 5.068V 3.369V 5.106V 86.735 39.35°C 229.83V

The results above are not used in the certification process

Ripple Measurements

Test12V5V3.3V5VSBPass/Fail
10% Load26.85mV14.47mV12.98mV7.44mVPass
20% Load24.30mV13.60mV13.24mV7.64mVPass
30% Load24.86mV13.24mV13.13mV7.85mVPass
40% Load25.47mV13.45mV13.08mV8.83mVPass
50% Load29.71mV13.86mV15.90mV8.57mVPass
60% Load29.20mV14.58mV20.42mV8.93mVPass
70% Load28.75mV15.19mV22.57mV9.49mVPass
80% Load30.38mV16.43mV24.93mV9.13mVPass
90% Load33.14mV15.19mV19.09mV9.70mVPass
100% Load45.37mV18.33mV17.90mV15.56mVPass
110% Load42.28mV18.55mV19.31mV15.24mVPass
Crossload128.96mV15.74mV17.63mV15.12mVPass
Crossload226.03mV19.91mV16.83mV14.67mVPass
Crossload323.88mV14.06mV18.47mV14.47mVPass
Crossload439.24mV17.64mV17.55mV13.89mVPass

The results above are not used in the certification process

Test12V5V3.3V5VSBPass/Fail
10% Load27.46mV15.65mV13.90mV8.98mVPass
20% Load24.75mV15.96mV13.80mV9.23mVPass
30% Load26.24mV14.68mV14.98mV8.93mVPass
40% Load28.85mV14.99mV13.29mV8.67mVPass
50% Load27.06mV14.83mV15.75mV8.88mVPass
60% Load29.82mV14.88mV20.32mV9.65mVPass
70% Load29.72mV16.94mV22.93mV9.60mVPass
80% Load30.59mV16.11mV24.22mV10.21mVPass
90% Load31.97mV17.29mV22.52mV10.42mVPass
100% Load46.55mV17.82mV17.80mV13.95mVPass
110% Load47.80mV17.27mV18.59mV14.73mVPass
Crossload129.52mV14.12mV18.18mV13.60mVPass
Crossload224.91mV19.66mV15.75mV13.86mVPass
Crossload323.94mV13.39mV17.14mV13.24mVPass
Crossload443.68mV16.28mV15.60mV13.07mVPass

The results above are not used in the certification process

Cooler Master GX III 750 Gold

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