The Seasonic Vertex PX-750 is a 750W, fully modular ATX 3.0 power supply with a hybrid fan mode, currently priced at $199.99 USD from various online retailers, launched at $169.99 USD MSRP. We recommend the Vertex PX-750 because of its load regulation, resilience to power excursions, and hybrid fan mode. Its modular design offers customizable cable management, ensuring a neat and clutter-free build. With 750W of power, it is suitable for high-performance systems, delivering stable and reliable performance.
WHAT YOU NEED TO KNOW
THE GOOD
- Warranty
Supported by a 12-year warranty. Outstanding for a power supply of this class.
- Performance
Performs very well all-round, great results on all of our tests and super high efficiency. This PSU passed all of the excursion tests and stayed within ATX requirements.
THE BAD
- Nothing at the time of writing
THE REST
- Overall
We recommend the Vertex PX-750 as it is a very good and reliable choice, meeting and exceeding expectations for its price point. It is efficient, performs well, and comes with necessary protections.
*This website uses affiliate links. Purchases made through these links may provide compensation to Linus Media Group.
The Seasonic Vertex PX-750 includes various hardware features for performance and convenience. It has a 135 mm Fluid Dynamic Bearing fan for quiet operation and sufficient connections to power the CPU, a 12VHPWR connector, another PCIe device, and numerous SATA devices.
In the Box, it comes with standard items and additional high-quality accessories such as a PSU and cable bag, velcro cable ties, and a decorative badge for your computer. The included tester is a fully molded piece of plastic, rather than a basic connector with wires provided by other manufacturers. The unit comes with plenty of cables, which, while not sleeved, are of excellent quality, regularly insulated, and have a braided pattern.
On the Seasonic specifications webpage it specifies that the Operating Temperature is 0°C to 50°C, though we cannot verify this through testing. The power ratings and specifications are exceptional, with an 80PLUS Platinum rating as expected for this price point.
1 of 3
Front of the box.
1 of 2
Power input side of the PSU.
Top of the PSU displaying the fan.
Bottom of the PSU displaying the specifications.
| +12 V | +5 V | +3.3 V | +5 Vsb | -12 V | |
|---|---|---|---|---|---|
| CURRENT | 62 A | 20 A | 20 A | 3 A | 0.3 A |
| WATTAGE | 744 W | 100 W | 15 W | 3.6 W | |
| 750 W | |||||
Please note that the above ratings are manufacturer advertised specifications.
The Vertex PX-750 features a hybrid fan mode that is digitally controlled and will not run until needed. This mode can be selected with a physical switch on the rear of the power supply. The Vertex PX-750 is equipped with all standard protections, and testing shows that they work with reasonable OCP and OPP trip points. It also comes with an upgraded 12-year warranty, which is outstanding for its class.
The Vertex PX-750 performed exceptionally well across all tests. Throughout its full rated output power range of 750W, there was only a 0.015V voltage drop on the 12V rail, which is within ATX specifications. The 5Vsb rail show minor variations as the load increased, but they remained well within specifications.
The power supply complies with ATX ripple specifications, with the peak-to-peak signal ripple of the fully loaded 12V rail at 30mV, and the 5V and 3.3V rails at 25mV and 15mV respectively. The Vertex PX-750 sustained all excursions while maintaining voltages within ATX specifications, providing a steady platform for high power GPUs and other components.
1 of 6
The Vertex PX-750 is rated at 80PLUS Platinum, achieving 92% efficiency at 50% of its maximum rated load. It maintains good efficiency even at low loads and is very resilient to brownouts, meeting certain ATX 3.0 specifications that many power supplies struggle with. It withstood 16ms and 15ms dropouts at full rated load for 115V and 230V inputs, respectively, making it a good option for areas with power reliability issues.
The Over Power Protection engaged at a maximum of 140% of the rated load, while the 12V rail alone is capable of 82A, or 133% of its rating. This provides good protection against component faults while allowing for slight power draw exceedances beyond the official rating.
