These power supplies use Japanese capacitors ... 750W, and 850W, but with ATX 2.52 specification. These have a five-year warranty and are the only series with non-modular cables.
CHIEFTEC has launched its new VEGA Series of power supply units (PSUs), conforming to Intel's ATX 12 V 3.1 standard and supporting PCIe Gen 5. The VEGA Series is 80 Plus Gold certified ...
FWIW KitGuru's reviews do not yet seem to be updated with ATX 3.1 testing procedures, but you can check HWBusters if you care about the additional measurements: ...