Good morning. Generally there are three causes for restarts: power / software / heat. And by the way, despite your PSU's wattage, it is absolutely possible that it's the cause of your rebooting. Matter-of-fact, it's the most likely cause of the three, simply because your GTX 1650 Super wouldn't generate much heat inside your case, making it less likely that your CPU is thermal thorttling to the point of reboot.
-- Action steps --
Please list full specs for your computer.
Download HW Monitor application, to measure temps
https://www.cpuid.com/downloads/hwmonitor/hwmonitor_1.41.exe
Take two photos of the inside of your build, upload to imgur, and place the links here. One photo should be the side label of your power supply only, and the other should show the entire "inside" of your computer case; showing the motherboard, case fans, etc. The purpose of the photos are to give an idea of air flow and power supply connections on the motherboard.
-- Questions --
Before you installed the GTX 1650 Super, which graphics card did you previously have installed? Did this rebooting problem exist before installing the new 1650 Super? What was the reason for this upgrade?