Introduction

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


After the 850 W and 550 W Super Flower Leadex III ARGB Gold reviews, it is now time for the 750 W PSU of the line with model number SF-750F14RG to meet my electronic loads. Besides the RGB fan, crystal cube connectors, and two instead of three ECO modes, there are no differences compared to the plain Leadex III models. The latter are notably more affordable than their ARGB siblings, with the price difference ranging from €20 to €24. If you desperately need your PSU to glow, I guess you won't mind paying the difference, especially as the cube connectors look much better than the plain Molex connectors.

Super Flower has also finally entered the US market, but it won't be easy to find stock because of the current situation. In Europe, two major online stores import Super Flower PSUs, Overclockers.co.uk and Caseking.de, and prices for the four Leadex III ARGB models with 550 W to 850 W maximum power output range from €110 to €150 including VAT.

Specifications

Photos

The box has a nice color scheme with a focus on the RGB colors. Inside, the PSU is very well protected, and there is a pouch with all the modular cables.


Besides the paperwork and a set of screws, you will also get a nice butterfly sticker.


Not many PSUs feature a white paintjob, which should put this PSU on your rather short list of options if you need to match a white chassis with a similarly colored power supply.


The cube-shaped modular connectors look nice, and the lighting effects make them even more appealing.


Dimensions are normal, and airflow is unobstructed at both the intake and exhaust grille.

Cables and Connectors

This unit has two EPS connectors on dedicated cables. There is no need for 16AWG gauges on a 750 W unit. Flexibility of the ATX, EPS, and PCIe cables is affected somewhat negatively by the in-cable caps. Many users, including myself, don't like cables with extra caps because they don't bend easily and are tough to route through narrow holes.


The peripheral cables are flat (ribbon style). It would be nice if the other cables were flat as well because it would make cable management easier.

Component Analysis

Before reading this page, we strongly suggest a look at this article, which will help you understand the insides of a PSU better.



Super Flower's Leadex III platform performs very well and reliably under even harsh operating conditions. The build quality is good, and most of the parts are of high quality. However, it would still be nice to see less Nichicon RZ caps and more Chemi-Con KY caps, which have a much longer lifetime.


The transient filter is complete, so I expect good EMI performance.


An NTC thermistor and relay combo protects against large inrush currents.


I couldn't identify the single bridge rectifier because the heatsink is in the way, and I didn't want to remove the bridge rectifier.


The APFC converter uses two Infineon FETs and one SPN5003 FET for reduced no-load consumption. The SPN5003 most likely cuts the power to the APFC off when the PSU is in standby mode. The boost diode is by STMicroelectronics, and the two bulk caps are by Chemi-Con. It would be nice to see 420 V or, even better, 450 V bulk caps since 400 V is close to the DC bus voltage of around 385 VDC.


Two Infineon FETs arranged in a half-bridge topology act as the main switching FETs.


Four Infineon IPP041N04N FETs regulate the +12 V rail.


Because of their low lifetime, the Nichicon RZ caps are my only complaint here. However, the W and KY caps handle the first ripple-filtering layer, while the RZ caps mentioned above are on the modular PCB, where the workload is low.


The two VRMs use eight Alpha & Omega FETs and two PWM controllers provided by ON Semiconductor.


The clear connectors look nice! I cannot say the same of the RZ caps. Besides them, several FP polymers are also used as a second ripple-filtering layer.


There are some spots where the soldering looks sloppy. All in all, this doesn't seem to affect overall performance.


The cooling fan measures 130 mm across and uses a fluid dynamic bearing.