>>105621773
Your PSU is fine as long as the power cable is correctly inserted and given enough clearance before you bend either side.
https://knowledge.seasonic.com/article/72-psu-recommendations-for-nvidia-rtx-4000-cards
https://knowledge.seasonic.com/article/79-comparison-atx-3-0-vs-atx-3-1-standards

You can also buy a reliable 90° cable that is confirmed to work safely with your PSU.