Based on the information you provided, it does seem like there might be an issue with the CPU itself. The thermal shutdown event at 96°C could indicate a potential overheating problem, but since you have an air-conditioned room and are using the stock cooler without overclocking, it shouldn't be the primary cause.
The fact that your CPU is now refusing to boot and getting stuck in a boot loop even after trying different operating systems and boot media suggests that the problem might be more than just a software or Windows issue. You've also taken appropriate troubleshooting steps, such as updating the BIOS, resetting CMOS, and testing different RAM configurations, which rules out some common hardware-related issues. At this point, since you've already tried various operating systems and the issue persists, it's a good idea to consider RMA-ing (Return Merchandise Authorization) the CPU. Since you purchased it in January 2021, it should still be under warranty, and the manufacturer should be able to replace it for you.
Before initiating the RMA process, make sure to check the warranty terms and conditions provided by the manufacturer to ensure your CPU is eligible for replacement. Additionally, you might want to contact the manufacturer's customer support for further assistance and guidance through the RMA process. Remember to back up your important data if possible before sending the CPU for replacement, as the warranty process may involve sending in the faulty CPU and waiting for the replacement to be sent back to you.
If you have any other questions or concerns, feel free to ask.
