ABKO COREMAX 500W BRONZE

Serial Number-

Lab IDAB50003398

Certification ID263398

Test Result Report ID: 26PS3398A
Certificate Issue Date: Sep 3, 2026

	115V
Scheme: ETA-EMI PSU

115V
	Scheme: LAMBDA PSU

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
Brand	ABKO
Model	COREMAX 500W BRONZE
OEM/ODM	PREE
Serial Number	-
Product Specifications
Manufacturer-Provided Information
Rated Voltage (Vrms)	115-230
Rated Current (Arms)	10
Rated Frequency (Hz)	50-60
Rated Power (W)	500
Operating Temperature (Continuous Full Load) (°C)	0 - 40
Type	ATX12V
Cable Design	Fixed cables
Warranty	No Info
Cybenetics Measurements
Dimensions (W x H x D)	150 x 85 x 140mm
Weight	1.63 kg (3.59 lb)
Cooling	120mm Sleeve Bearing Fan (W12025HZ12SEMA)
Semi-Passive Operation	✗
Cybenetics Testing Information
Lab ID	AB50003398
Date of receipt	Jul 28, 2026
Testing Date	Aug 27, 2026
Report Issued Date	Sep 3, 2026
Engineer Name	Efstathios Papadopoulos
Authorized By the Laboratory Technical Manager	Aristeidis Bitziopoulos
Signature

Cables and Connectors(Non-accredited measurements)

`Captive Cables`
Description	Cable Count	Connector Count (Total)	Gauge	Cable Type
ATX connector 20+4 pin (520mm)	1	1	18AWG	Tinned Copper
4+4 pin EPS12V (630mm+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
SATA (450mm+150mm+150mm+150mm)	1	4	18AWG	Tinned Copper
SATA (450mm+150mm) / 4-pin Molex (+150mm)	1	2/1	18AWG	Tinned Copper
4-pin Molex (450mm+150mm) / SATA (+150mm)	1	2/1	18AWG	Tinned Copper

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

Rail		3.3V	5V	12V	5VSB	-12V
Max. Power	Amps	20	20	41.7	2.5	0.3
Max. Power	Watts	125		500	12.5	3.6
Total Max. Power (W)		500

Parts Description

`General Data`
Manufacturer (OEM)	PREE
PCB Type	Double-Sided
`Primary Side`
Transient Filter	4x Y caps, 2x X caps, 2x CM chokes
Inrush Protection	NTC Thermistor 2.5D-9 (2.5 Ohm @ 25°C)
Bridge Rectifier	1x Diodes GBU1510 (1000V, 8A @ 100°C)
APFC MOSFETs	2x Maple Semiconductor SLP18N50S (500V, 11.7A @ 100°C, Rds(on): 0.330Ohm)
APFC Boost Diode	Microsemi UF860 (600V, 8A @ 25°C)
Bulk Cap(s)	Toshin Kogyo (420V, 270uF, 2000h @ 105°C, LA)
Main Switchers	2x Maple Semiconductor SLP18N50S (500V, 11.7A @ 100°C, Rds(on): 0.330Ohm)
PFC/PWM Combo Controller	Champion CM6805BG
Topology	Primary side: APFC, Double Forward Secondary side: [12V] Passive Rectification & [Minor Rails] DC-DC converters
`Secondary Side`
+12V MOSFETs	5x HS 6NX014
5V & 3.3V	DC-DC Converters: 4x AP70N03NF (30V, 51A @ 100°C, Rds(on): 5.5mOhm) PWM Controller(s): ANPEC APW7159C
Filtering Capacitors	Electrolytic: 12x 12Kuang Jin (2-3,000 @ 105°C, GR ) Polymer: 2x
Supervisor IC	EST 7610FS
Fan Model	WAM W12025HZ12SEMA (120mm, 12V, 0.20A, Rifle Bearing Fan)
`5VSB Circuit`
Rectifier	HS 6NX014
Standby PWM Controller	EST 2816H

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	✓
Conducted Emissions EN 55032 & CISPR 32	Passed

Performance Summary 115V

Accredited
Average Efficiency (>1450 load combinations)	83.652%
Average Noise Output (>1450 Load Combinations)	42.77dBA
Average PF (>1450 Load Combinations)	0.977
Efficiency With 10W (≤500W) or 2% (>500W) Load	51.944%
Standby Power Consumption	0.0702W
Non-Accredited
12V Ripple (Full Load)	65.44mV
5V Ripple (Full Load)	25.35mV
3.3V Ripple (Full Load)	22.63mV
5VSB Ripple (Full Load)	19.61mV
12V Load Regulation	0.43%
5V Load Regulation	1.69%
3.3V Load Regulation	2.24%
5VSB Load Regulation	2.54%
Inrush Current	59.630A

Hold-Up Time & PWR_OK Signal

Hold-Up Time (ms)	13.7
AC Loss to PWR_OK Hold Up Time (ms)	11.0
PWR_OK Inactive to DC Loss Delay (ms)	2.7

Stromverbrauch im Ruhezustand

Tables 115V

Detailed Results
	Average	Min	Limit Min	Max	Limit Max	Result
Mains Voltage RMS:	115.00 V	114.96 V	113.85 V	115.02 V	116.15 V	PASS
Mains Frequency:	60.00 Hz	59.94 Hz	59.40 Hz	60.01 Hz	60.60 Hz	PASS
Mains Voltage CF:	1.416	1.416	1.340	1.418	1.490	PASS
Mains Voltage THD:	0.15 %	0.07 %	N/A	0.22 %	2.00 %	PASS
Real Power:	0.070 W	0.048 W	N/A	0.091 W	N/A	N/A
Apparent Power:	5.895 W	5.710 W	N/A	5.959 W	N/A	N/A
Power Factor:	0.013	N/A	N/A	N/A	N/A	N/A

Graphs 115V

Efficiency Graph

115V

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

Efficiency and power factor by load range

Load range	Points	Efficiency 115V	PF 115V
0-<20 %	132	76.86%	0.963
20-<40 %	370	82.95%	0.974
40-<60 %	389	84.83%	0.976
60-<80 %	386	84.91%	0.980
80-100 %	403	84.19%	0.983
70-100 % (High-Load)	596	84.39%	0.982
All (published average)	1680	83.65%	0.977

INFO

The average efficiency and power factor in five ranges of load. Calculated from the 1680 (115V) load combinations of the certification sweep, the same data that ETA and LAMBDA use (test 0 excluded). Load is the total DC output as a share of the rated 500 W. These are plain averages of the valid readings, as for the ETA rating, so the ranges combined give back the published averages.

Informational. Not part of the ETA or LAMBDA rating.

Noise Graph

115V

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

Noise by load range

High-Load Index (70-100 % load)

Noise 45.8 dB(A) at 115V · loudest point 45.8 dB(A)

Efficiency 84.39% · power factor 0.982 (115V)

Load range	Noise 115V avg (loudest)	Fan off 115V
0-<20 %	27.9 (37.8)	0%
20-<40 %	32.5 (42.2)	0%
40-<60 %	39.9 (45.8)	0%
60-<80 %	44.9 (45.8)	0%
80-100 %	45.8 (45.8)	0%
70-100 % (High-Load)	45.8 (45.8)	0%
All (published average)	42.8 (45.8)	0%

INFO

The average noise in five ranges of load, the share of points with the fan stopped (semi-passive operation), and the High-Load Index: the same figures for all points at 70 % of the rated output and above. Calculated from the 1680 (115V) load combinations of the certification sweep, the same data that ETA and LAMBDA use (test 0 excluded). Load is the total DC output as a share of the rated 500 W. Noise is averaged on the energy scale, as for LAMBDA, so the ranges combined give back the published average noise. Each load combination is held for about five seconds; the stabilized readings at fixed loads are under "Noise under high ambient temperature".

Informational. Not part of the ETA or LAMBDA rating.

Noise under high ambient temperature (indicative)

115V

Load	Normal ambient fan · noise · intake	High ambient fan · noise · intake	Noise change
10%	707 RPM · 15.6 dB(A) · 30.6 °C	731 RPM · 16.5 dB(A) · 34.4 °C	+0.9 dB(A)
20%	711 RPM · 15.6 dB(A) · 30.3 °C	735 RPM · 17.1 dB(A) · 34.6 °C	+1.5 dB(A)
50%	1382 RPM · 36.4 dB(A) · 30.2 °C	1722 RPM · 42.6 dB(A) · 36.2 °C	+6.2 dB(A)
100%	1853 RPM · 46.0 dB(A) · 31.0 °C	1869 RPM · 46.3 dB(A) · 39.3 °C	+0.3 dB(A)

INFO

Fan speed, noise and the measured intake temperature at 10, 20, 50 and 100 % load, from the two load regulation tests: at normal ambient (about 30-32 °C) and at high ambient (about 40-47 °C). These are stabilized readings at fixed loads, not averages over the certification sweep, so they are indicative of how the fan behaves when it is hot. "<6.0" is the floor of our sound meter, with the fan stopped; with the fan stopped, the intake sensor can read higher than the chamber air.

Informational. Not part of the ETA or LAMBDA rating.

Conducted Emissions EN 55032 & CISPR 32

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) 115V

Test #	5VSB	DC/AC (Watts)	Efficiency	PF/AC Volts
1	0.045A	0.236W	63.378%	0.08
1	5.25V	0.373W	63.378%	114.95V
2	0.09A	0.473W	71.68%	0.133
2	5.25V	0.659W	71.68%	114.93V
3	0.55A	2.879W	79.766%	0.341
3	5.233V	3.609W	79.766%	114.93V
4	1A	5.218W	80.248%	0.378
4	5.216V	6.502W	80.248%	114.93V
5	1.5A	7.797W	80.189%	0.404
5	5.197V	9.723W	80.189%	114.94V
6	2.501A	12.892W	79.53%	0.433
6	5.156V	16.21W	79.53%	114.93V

Protection Features

OCP (Normal @ 27.2°C)	12V: 47.600A (114.24%), 12.146V — shut down 5V: 30.900A (154.50%), 4.916V — shut down 3.3V: 29.800A (149.00%), 3.341V — shut down 5VSB: 4.300A (172.00%), 5.056V — shut down
OCP (Hot @ 38.1°C)	12V: 45.800A (109.92%), 11.612V — shut down 5V: 31.000A (155.00%), 4.913V — shut down 3.3V: 25.300A (126.50%), 3.347V — shut down 5VSB: 4.300A (172.00%), 5.051V — shut down
OPP (Normal @ 24.9°C)	608.02W (121.60%) — shut down
OPP (Hot @ 40.1°C)	581.00W (116.20%) — shut down
OTP	✓ (140°C @ 12V Heatsink)
SCP	12V to Earth: ✓ 5V to Earth: ✓ 3.3V to Earth: ✓ 5VSB to Earth: ✓ -12V to Earth: ✓
PWR_OK	Accurate but short
UVP (Typical Load @ 90V)	✓
UVP (No Damage @ 80V)	✓
Conducted Emissions EN 55032 & CISPR 32	✓
NLO	✓
Fan Failure Protection	✗
SIP	Surge: None Inrush: NTC & Bypass Relay

Supplementary Tests (For Reference)

Typical Load Tests 115V

Test	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed (RPM)	PSU Noise (dB[A])	Temps (In/Out)	PF/AC Volts
10%	2.306A	1.981A	1.957A	0.96A	50.006	76.32%	731	16.5	34.43°C	0.952
10%	12.317V	5.05V	3.372V	5.211V	65.521	76.32%	731	16.5	37.26°C	114.93V
20%	5.608A	2.977A	2.943A	1.154A	99.956	83.199%	735	17.1	34.59°C	0.986
20%	12.311V	5.041V	3.364V	5.199V	120.141	83.199%	735	17.1	38.59°C	114.91V
30%	9.260A	3.478A	3.44A	1.35A	149.997	84.717%	1349	35.8	35.07°C	0.973
30%	12.305V	5.034V	3.358V	5.187V	177.057	84.717%	1349	35.8	39.64°C	114.9V
40%	12.914A	3.979A	3.938A	1.546A	200.039	85.594%	1606	40.6	35.57°C	0.974
40%	12.299V	5.028V	3.352V	5.175V	233.705	85.594%	1606	40.6	41.46°C	114.85V
50%	16.228A	4.982A	4.935A	1.744A	249.989	85.82%	1722	42.6	36.17°C	0.976
50%	12.292V	5.02V	3.344V	5.163V	291.293	85.82%	1722	42.6	41.88°C	114.84V
60%	19.550A	5.989A	5.937A	1.942A	300.01	85.67%	1837	45.6	36.63°C	0.978
60%	12.286V	5.01V	3.335V	5.15V	350.191	85.67%	1837	45.6	43.58°C	114.83V
70%	22.875A	7A	6.943A	2.142A	350.045	85.302%	1868	46.3	37.18°C	0.98
70%	12.280V	5.001V	3.328V	5.137V	410.362	85.302%	1868	46.3	47.02°C	114.82V
80%	26.205A	8.014A	7.952A	2.242A	399.572	84.778%	1870	46.3	37.82°C	0.982
80%	12.275V	4.992V	3.319V	5.129V	471.318	84.778%	1870	46.3	49.39°C	114.81V
90%	29.935A	8.526A	8.449A	2.343A	449.802	84.226%	1871	46.3	38.91°C	0.983
90%	12.270V	4.985V	3.313V	5.122V	534.04	84.226%	1871	46.3	51.13°C	114.78V
100%	33.669A	9.039A	8.979A	2.445A	500.141	83.173%	1869	46.3	39.3°C	0.985
100%	12.264V	4.978V	3.307V	5.114V	601.326	83.173%	1869	46.3	53.35°C	114.77V
110%	37.025A	10.063A	10.094A	2.447A	549.532	82.38%	1885	46.4	40.06°C	0.985
110%	12.254V	4.969V	3.298V	5.108V	667.388	82.38%	1885	46.4	53.39°C	114.75V
CL1	0.113A	15.184A	15.051A	0.001A	126.288	77.569%	1663	41.7	34.22°C	0.974
CL1	12.297V	4.959V	3.295V	5.231V	162.808	77.569%	1663	41.7	40.76°C	114.9V
CL2	0.113A	20.197A	0.001A	0.001A	101.395	76.207%	1578	40.4	34.58°C	0.98
CL2	12.307V	4.951V	3.363V	5.242V	133.052	76.207%	1578	40.4	39.37°C	114.91V
CL3	0.113A	0A	20.063A	0.001A	67.388	70.59%	1346	35.8	34.89°C	0.978
CL3	12.307V	5.04V	3.289V	5.239V	95.464	70.59%	1346	35.8	38.96°C	114.94V
CL4	40.734A	0A	0A	0A	500.059	84.23%	1875	46.4	39.95°C	0.985
CL4	12.276V	5.041V	3.36V	5.231V	593.68	84.23%	1875	46.4	51.68°C	114.78V

The results above are not used in the certification process

Light Load Tests 115V

Test	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed (RPM)	PSU Noise (dB[A])	Temps (In/Out)	PF/AC Volts
20W	1.206A	0.494A	0.488A	0.191A	20	61.822%	617	12.3	30.26°C	0.897
20W	12.317V	5.062V	3.381V	5.244V	32.351	61.822%	617	12.3	30.65°C	114.94V
40W	2.654A	0.692A	0.683A	0.286A	39.999	74.909%	664	14.1	31.05°C	0.96
40W	12.317V	5.06V	3.379V	5.24V	53.397	74.909%	664	14.1	32.82°C	114.93V
60W	4.102A	0.89A	0.879A	0.382A	59.999	79.588%	703	15.6	32.26°C	0.951
60W	12.316V	5.057V	3.378V	5.235V	75.387	79.588%	703	15.6	35.38°C	114.92V
80W	5.548A	1.088A	1.075A	0.478A	79.96	82.413%	724	16.5	33.59°C	0.98
80W	12.315V	5.055V	3.375V	5.23V	97.023	82.413%	724	16.5	37.09°C	114.92V

The results above are not used in the certification process

Ripple Measurements 115V

Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	16.84mV	16.93mV	11.59mV	21.75mV	Pass
20% Load	16.84mV	17.80mV	11.44mV	19.41mV	Pass
30% Load	21.07mV	18.26mV	12.31mV	18.75mV	Pass
40% Load	20.56mV	18.57mV	12.92mV	18.95mV	Pass
50% Load	23.15mV	19.33mV	13.83mV	18.59mV	Pass
60% Load	27.38mV	20.91mV	15.05mV	19.92mV	Pass
70% Load	30.58mV	21.52mV	16.28mV	17.68mV	Pass
80% Load	37.14mV	22.90mV	20.50mV	18.90mV	Pass
90% Load	47.73mV	23.77mV	21.92mV	18.24mV	Pass
100% Load	65.44mV	25.35mV	22.63mV	19.61mV	Pass
110% Load	71.41mV	28.61mV	22.89mV	22.06mV	Pass
Crossload1	20.40mV	27.95mV	23.70mV	20.63mV	Pass
Crossload2	24.02mV	33.11mV	20.24mV	21.45mV	Pass
Crossload3	25.09mV	18.72mV	24.72mV	15.90mV	Pass
Crossload4	71.69mV	21.78mV	16.84mV	16.00mV	Pass

The results above are not used in the certification process

ABKO COREMAX 500W BRONZE

Top side

Power specifications label

Fan

PSU Internals