Super Flower Leadex III ARGB Gold 850 W Review 7

Super Flower Leadex III ARGB Gold 850 W Review

Load Regulation, Hold-up Time, Inrush Current, Efficiency & Noise »


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We would like to thank Super Flower for supplying the review sample.

The cooperation with EVGA seems to be at an end, but Super Flower is still alive and kicking, releasing new models while trying to move deeper into the retail market. The latest variation of the Leadex III lines features ARGB lighting and 80 PLUS Gold and Cybenetics ETA-A efficiency certifications.

There are four Leadex III ARGB models with capacities ranging from 850 W to 550 W. They are not available in the US yet. In Europe, prices including VAT range from €110 to €150. The price difference to the plain Leadex III units without ARGB ranges from €20 to €24. Another difference is that the ARGB models only have two ECO modes instead of the three the non-ARGB units feature, which is not a major issue because the difference in noise output between the two ECO modes of the non-ARGB units is low. ARGB is a welcome feature for those with a windowed chassis that doesn't hide the power supply.

I have already evaluated the 650 W and 850 W non-ARGB Leadex III models. In this review, I will take a detailed look at the 850 W ARGB model, the strongest of them. As it is based on the same platform, I expect high performance in all areas, especially transient loads.


Super Flower SF-850F14RG Features & Specifications
Max. DC Output850 W
EfficiencyCybenetics ETA-A & 80 PLUS Gold
NoiseCybenetics LAMBDA-A
Modular✓ (fully)
Intel C6/C7 Power State Support
Operating Temperature0–50 °C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
Cooling130 mm Fluid Dynamic Bearing Fan (S1302412M)
Semi-passive Operation✓ (selectable)
Dimensions150 mm (W) x 85 mm (H) x 160 mm (D)
Weight1.55 kg (3.42 lb)
ComplianceATX12V v2.4, EPS 2.92
Warranty7 years
Price at Time of Review (incl. VAT)€150

The fan is 130 mm across even though the PSU allows for a larger fan for an even quieter operation, and the warranty is pretty long at seven years.

Super Flower SF-850F14RG Power Specifications
Rail3.3 V5 V12 V5 VSB-12 V
Max. Power20 A20 A70.8 A3 A0.5 A
100 W849.6 W15 W6 W
Total Max. Power850 W

Cables and Connectors

Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (590 mm)1118-22AWGYes
4+4 pin EPS12V (690 mm)2218-22AWGYes
6+2 pin PCIe (540 mm+150 mm) 3618-22AWGYes
SATA (550 mm+120 mm+120 mm)3918AWGNo
4-pin Molex (550 mm+100 mm+100 mm+100 mm)1418AWGNo
ARGB Sync cable (550 mm+180 mm)1228AWGNo
AC Power Cord (1380 mm) - C13 coupler1118AWG-

With two EPS, six PCIe, nine SATA, and four 4-pin Molex connectors, there are enough connectors to deliver the PSU's maximum power output without notable voltage drops.

The distance between peripheral connectors is short, however. Thankfully, the ATX and EPS cables are quite long. What will probably trouble most users is the presence of in-cable caps, which can make cable-routing challenging.

Component Analysis

Super Flower SF-850F14RG Parts Description
General Data
Manufacturer (OEM)Super Flower
Platform ModelLeadex III
PCB TypeSingle Sided
Primary Side
Transient Filter4x Y caps, 3x X caps, 2x CM chokes, 1x MOV
Bridge Rectifier(s)1x
Inrush Current ProtectionNTC Thermistor & Relay
APFC MOSFETs2x Infineon IPA50R140CP(550 V, 15 A @ 100 °C, 0.14 Ohm) & 1x SPN5003 FET (for reduced no-load consumption)
APFC Boost Diode1x STMicroelectronics STTH8R06D (600 V, 8 A @ 130 °C)
Hold-up Cap(s)2x Nippon Chemi-Con (400 V, 390 uF each or 780 uF combined, 2,000 h @ 105 °C KMR)
Main Switchers2x Infineon IPA50R140CP (550 V, 15 A @ 100 °C, 0.14 Ohm)
APFC ControllerSF29603 & S9602
Switching ControllerSF29605
TopologyPrimary side: Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12 V6x Infineon IPP041N04N (40 V, 80 A @ 100 °C, 4.1 mOhm)
+5 V & +3.3 VDC-DC Converters: 8x Alpha & Omega AON6516 (30 V, 25 A @ 100 °C, 8 mOhm @ 125°C)
PWM Controllers: 2x ON Semiconductor NCP1587A
Filtering CapacitorsElectrolytics: 7x Nippon Chemi-Con (105 °C, W), 4x Nippon Chemi-Con (4 - 10,000 h @ 105 °C, KY), 2x Nippon Chemi-Con (1 - 2,000 h @ 105 °C, KMG), 2x Nippon Chemi-Con (1 - 5,000 h @ 105°C, KZE), 7x Nichicon (1,000 h @ 105 °C, RZ)
Polymers: 8x FPCAP, 5x United Chemi-Con, 2x Jamicon
Supervisor ICSF29603 & LM339A
Fan ControllerSTMicroelectronics STM8S003F3
Fan ModelGlobe Fan S1302412M (130 mm, 12 V, 0.40 A, Fluid Dynamic Bearing Fan)
5VSB Circuit
Rectifiers1x PFC Device PFR20L60CT (60 V, 20 A)
Standby PWM ControllerSF29604

This is the Super Flower Leadex III platform with the addition of an ARGB fan and "only" one semi-passive mode instead of the two that the non-ARGB Leadex III units feature. On the primary side is a half-bridge topology, which is supported by an LLC resonant converter for higher efficiency. The secondary side utilizes a synchronous rectification scheme, and the minor rails are generated through two VRMs. The parts Super Flower uses are of good quality, but soldering quality is not as good as with other high-end PSUs. That having been said, it won't create any problems and doesn't seem to affect the PSU's performance.

The transient filter has all the parts necessary to block any incoming and outgoing EMI emission. However, the tests I will conduct will also verify whether EMI is as it should be.

The platform uses an MOV and NTC thermistor-relay combo for protection against surges and inrush currents.

A single bridge rectifier has been bolted to the primary heatsink.

The APFC converter uses two Infineon FETs and an STMicroelectronics boost diode. The bulk caps have enough capacity, but I would like to see a higher voltage rating of at least 420 V.

The main switchers are arranged in a half-bridge topology, and an LLC converter reduces energy losses.

The +12V FETs are installed on two small heatsinks.

Between the +12V heatsinks are a number of electrolytic caps for filter filtering.

Two small boards host the VRMs that generate the minor rails.

The modular board hosts a number of polymer and electrolytic caps used for ripple filtering.

This is the 5VSB circuit.

Not the best soldering quality, it won't create any performance and reliability issues.

The cooling fan is by Globe Fan, and it measures 130 mm across. I hate the fan-control board because it can easily break from its base, and if so, it is next to impossible to solder back in place. Before I disconnected the fan header, I applied glue to the base of this board for more stability.
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May 16th, 2022 07:06 EDT change timezone

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