The Seasonic Prime TX-850 wins in 4 out of 9 comparable specs, with 2 ties. Its biggest advantage is SATA Connectors (75% better).
RM850x (2024) wins in 3 specs (12VHPWR Connector: 100% better).
Recommendation
Choose Prime TX-850 if you want the best overall performance — especially sata connectors.
Choose RM850x (2024) if 12vhpwr connector matters more to you.
