About the Cooler Master MWE gold 750w:https://www.coolermaster.com/catalog/power-supplies/mwe-series/mwe-gold-750/#Specifications
"In summary, the Cooler Master MWE Gold 750 delivers on efficiency, but the less than impressive component selection doesn’t instill much confidence in long-term durability. It definitely would not be my pick for 24/7 use under heavy load".
This PSU is warranty for 5 years. Next time look for a 7-10-12 year warranty PSU, much more suitable for a gaming PC (Continuous high current load for 2-3 hours of gaming). Anything made by Seasonic or Super Flower (EU)