Nexus introduced the RX-5300 530W and the RX-6300 630W power supplies.
Here's a snip from their PR:
Nexus power supplies are designed to provide your PC stable and efficient power to guarantee perfect PC performance. Yet we have set everything to work to make these power supplies the quietest in the market.
The RX-5300 and RX-6300 are single 12V rail power supplies and offer over 82% efficiency. They use less than 3 Watt in sleep mode, come with X-mesh sleeved modular cables and like their bigger brothers, the RX-8500 and the RX-1K, the RX-6300 and the RX-5300 have an inaudible performance.