Seasonic Focus GX-750


The following system was used to test the cooler:
– Processor: Intel i9 9900K @ 5GHz
– Motherboard: ASRock Z390 Phantom Gaming X
– RAM: Ballistix Tactical Tracer 16GB DDR4 @ 2666MHz
– GPU: MSI GeForce RTX 2070 Super Gaming X Trio
– SSD: Crucial MX 500GB
– HDD: WD 1 TB Blue
– CPU Cooler: CoolerMaster MasterLiquid 240 with NoiseBlocker eLoop B12-PS
– Display: AOC i2769VM
– Case: Phanteks Enthoo Luxe White
– OS: Windows 10 64-bit


The above system has a power consumption of approximately 502W when in full load and 68W when idle, in order to test the efficiency of the Power Supply, the power draw of the system was measured at the wall socket. Also, the voltages were measured on the +12v +5v and +3.3v using a multi-meter.

To load the system to its maximum the stability test of the AIDA64 Extreme 6.25.5400 was used with Intel Burn Test V2.
The Power Supply was tested with the system both idle and at maximum load.


Power Supply efficiency


For rail voltage tolerance levels, ATX (Power Supply Design Guide) specify that a 5% variable fluctuation is acceptable.


Voltage oscillation idle


Voltage oscillation load


The noise level was measured at three different distances from the fans (10cm, 20cm, 30cm.) the noise was measured with a margin of error of ± 5 db.


Final thoughts

The Seasonic FOCUS GX-750 is available for around 120 USD or EUR, and for that it offers a good performance and a simple design that will be easy to match with any configuration.
The performance of the power supply is very good, this is mainly thanks to the excellent internal build quality and the usage of high-quality components. In terms of efficiency, the FOCUS GX-750 reached a maximum efficiency of 91.8% with a load of 500W.

The FOCUS GX-750 also has an internal wireless design, this is done to reduce the number of restrictions and allow the airflow to pass through all components.

The power supply is silent, the fan will not spin until the load reaches 30% of the total wattage capacity of the power supply. In addition, the fan operating modes can be changed by pressing the Hybrid mode button located at the back of the power supply. The power supply reached a peak of 30 decibels measured at the standard 10 centimeters from the system. The fan has no bearing noises or low pitch tones while spinning.

In conclusion, the Seasonic FOCUS GX-750 is a good power supply that improves on the already great Seasonic Focus series. The FOCUS GX-750 is available with a 10-year warranty, which shows the quality and performance of the improved Focus platform. The modular cables are flat and flexible, and all of them have a good length. The performance is good, both in terms of efficiency and voltage regulation.

2 thoughts on “Seasonic Focus GX-750

  • September 5, 2020 at 11:54 pm

    Hold-up time FOR Seasonic Focus GX-750 ??

    • September 6, 2020 at 11:12 pm

      Unfortunately, at the moment, I cannot measure Hold-up time.


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