Weird laptop reboots

Hello. I'm asking for useful guesses, if it is possible with such lack of info and wierd symptoms. But I will try to provide the most complete info.

My laptop is: Clevo NH57VR (well-known as XMG Apex 15 max: Ryzen 5600, RTX 3060, driver 531.18, 8+8 brand-new DDR4 AData RAM), Windows 11 (installed recently, on old SSD). I also have one more SSD and HDD. Laptop is brand-new, 3-4 months old.

It began to happen after I replaced HDD from old 500 gb to new 2000 gb. Replacing is very easy, I did it very carefully, don't think I could damage something. But I don't remember any problems before I did it. The most demonstrative problem was like this:

1. I played to Valorant (low-demanding game. 2. Laptop stattered for a moment 3. Then USB keyboard (that I'm using with external monitor) just turned off. (Few moments later I found that USB port was turned off: I repluged the keyboard, but the usb didn't give any power - even no lighting on keyboard). 4. But the mouse proceeded to work, same as laptop integrated keyboard. Mouse is connected to other USB. 5. Then game stuck. But Windows proceeded to work normally! 6. But Internect connection was also lost (i'm using ethernet cabel). Windows showed like I disconnected the cabel itself. 7. I rebooted the laptop. But Windows stuck on shutting down, so I had to turn it off by long-pressing the power button. 8. After I turned the laptop on, everything worked perfect. Even in hard demanding games.

It was \~a week ago. I thought Vanguard (the game antichit) could be a problem, so I uninstalled it. But an hour ago I got a reboot... It was like this:

1. I played League of Legends (low-demanding game). 2. I noticed small artifacts in Chrome: text on the one page looked weird. It was just on a single page, Youtube worked great. 3. Then I noticed a small artifact in the game. Like a 3d model left a black trace. 4. After a few seconds, (maybe 10-20 seconds), laptop shut down and reboot. No BSOD, no turning off - just black screen and turning off. 5. For now it works well, as always.

I have some thougths on this problem.

1. May it be the short circuit in the USB port? So, can I prevent problems just by not using it? 2. Some guy told me, it is the chipset is glitching. Maybe it's overheating. Can it be the problem? 3. Can the new HDD cause the problem? I bought it's from second hands, but it's almost new. I don't know, it's just usual Seagate HDD... 4. Of course, it is hardware problem. Or it is not?..

If you could say, what and how could I test, I would be really thankfull. Also any guesses would be really useful.

For now I tested vRAM in OCCT for 2 minutes. No problems.

You can ask questions, if you're interested. If I dont response, then i'm sleeping, i'll answer later.

Thank you for reading and help.

>!And sorry for my English.!<