Is it normal for my PC to constantly overheat and require reseating cables?

It's definitely not normal to have to reseat cables so often. You might want to check the quality of your PSU, as it can be a major cause of overheating if it's failing. Also, never underestimate good cable management! Poor wiring can restrict airflow and lead to overheating, so organizing your cables could help. Make sure your CPU cooler is installed correctly and functioning well, too. Good airflow in your case is key, and you might want to look into improving that as well.

From what you’re describing, it sounds more like a cooling issue rather than a PSU or cable problem. If your CPU temperatures are hitting the high 90s and even 100°C, that's alarming! High temperatures can often be due to poorly installed CPU coolers or inadequate case airflow. You should check that your cooling system is working properly and consider cleaning out any dust buildup. Additionally, make sure that your wires aren’t blocking any fans, as that can severely impact airflow and lead to these overheating issues.

Reseating PSU cables usually isn’t a regular fix for overheating. If your PC is shutting down due to heat, reseating might just be temporary relief. Your PSU should be fine as long as it's not overvolting. The overheating you're experiencing may be from mismanaged airflow or perhaps an improperly mounted cooler. It's really important to monitor the temps closely and ensure everything is connected properly. I recommend reaching out to someone who can help with wiring if you're having trouble doing it yourself.