ATX 3.1 Rated, used for casual gaming for the last 4 years until I built an new SFF PC.

Original product listing: https://www.corsair.com/us/en/p/psu/cp-9020196-na/rm-series-rm850-850-watt-80-plus-gold-certified-fully-modular-psu-cp-9020196-na

All original cables still included: 24 pin ATX cable (3) 6 pin 4 port SATA cables (3) 6+2 pin PCIe cables (2) 8 pin PCIe cables 6 pin PCIe to 4 port 4 pin Molex cable Power Cable (4) mounting screws