rtx 3060 ti 550w psu

NVidia recommends a 600W PSU. rtx 3080 gaming z trio 10g lhr GeForce RTX 3060 Ti Graphics Card | NVIDIA Your 550W PSU may very well work BUT if it is close to 5 years old (warranty period) I would absolutely replace it with a quality 650 W PSU It's quite new I bought it in June 2020