EVGA SuperNOVA 750 G6 Power Supply Review

EVGA returns to the top of the performance club with its new G6 line. The 750W G6 model has tight load regulation, long hold-up time, low inrush currents. Its transient response at 12V is pretty good, and the same goes for its ripple suppression. It competes nicely with the best power supplies, though is slightly outpaced by the Corsair RM750x and the Cooler Master V750 Gold V2. 

The 1000 G6 model topped the list, and the 850 G6 wasn't a threat to the Corsair RM850x (2021) model, which is its major opponent, so we are curious to see how the 750 G6 will fare against the tough competition in this wattage and efficiency category. All G6 units have big shoes to fill since they have to compete with other models in the respective categories and the previous generation G3 models, which were among the best PSUs in EVGA's portfolio. Nonetheless, since EVGA decided to end its cooperation with Super Flower, they turned to Seasonic for the G6 line, and this is a good move since this OEM is among the best. 

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The EVGA SuperNOVA 750 G6 is Gold rated in both 80 PLUS and Cybenetics schemes, and it is also rated as Cybenetics A- in noise output, meaning within 25-30 dBA average output. All G6 models are fully modular and use an upgraded version of Seasonic's viral Focus Gold platform. The cooling fan uses a fluid dynamic bearing for a longer lifetime, the dimensions are compact with only 140mm depth, and finally, the provided warranty is long at ten years. 

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Specifications of EVGA SuperNOVA 750 G6

Power Specifications of EVGA SuperNOVA 750 G6

Cables & Connectors on EVGA SuperNOVA 750 G6

There are enough cables and connectors to allow the PSU to deliver its full power without any issues. Moreover, they are quite long, especially the EPS and PCIe cables. Thankfully, there are no in-cable caps, but the distance between peripheral connectors is small at 100mm. 

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Component Analysis of EVGA SuperNOVA 750 G6

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

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Platform

EVGA asked Seasonic to make several changes to its Focus Gold platform for the G6 models. The most important change is the addition of an MCU for controlling the fan speed profile. The same MCU also handles firmware over power protection and over temperature protection. The cable connecting the MCU with the NTC thermistor, located on the modular PCB, looks awkward, but it would cost much for a complete redesign of the PCB, so this was the easiest way.  

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Transient Filter

The transient/EMI filter uses four Y and two X caps, two CM chokes, and a discharge IC, which basses the bleeding resistors used by the X caps when power is applied to the PSU. This way, efficiency gets a small boost. An MOV protects against power surges, and an NTC thermistor and relay combo handle large inrush currents. 

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Bridge Rectifiers

The pair of bridge rectifiers can handle up to 30 Amps. They are installed on a leaning heat sink, to allow for more airflow to the APFC's input capacitor. 

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APFC Converter

The APFC converter uses two Infineon FETs and a single boost diode. The bulk caps are provided by Chemi-Con and besides enough capacity, they are of high quality, too. 

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Main FETs

The main FETs, four Infineon IPA60R230P6, are installed into a full-bridge topology. 

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12V and Minor Rails

Four Nexperia FETs handle the 12V rail, while the minor rails are generated through a pair of DC-DC converters. The latter use six Nexperia FETs, and the joint PWM controller is an ANPEC APW7159C.

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Filtering Caps

The electrolytic caps on the secondary side are provided by Chemi-Con and Rubycon and are of good quality to outlive the ten-year warranty. Lots of polymer caps are also used by Chemi-Con and FPCAP. 

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5VSB

The standby PWM controller is an Excelliance MOS EM8569C. The 5VSB circuit needs a redesign to offer higher efficiency.

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Many polymer caps are installed on the face of the modular board, along with several bus bars for lower energy losses on power transfer. 

The main supervisor IC is a Weltrend WT7527RA which a Weltrend WT51F104 supports. The latter handles firmware OPP and OTP.

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Soldering quality is satisfactory. 

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The cooling fan is provided by Hong Hua, a manufacturer with high performance per price products. It uses a fluid dynamic bearing, so it won't have any reliability issues unless exposed to high operating temperatures (>40 degrees Celsius) for prolonged periods. For tough conditions, DBB fans are preferred over FDB ones. 

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