PC Rebooting In-Game

[Python350]

I am really desperate to find a solution. The Kernel 41 thing where my PC suddenly reboots in the middle of a game keeps happening ever since my 500w PSU exploded a few weeks ago (most likely due to overheat) replaced it with a 650w, also reinstalled windows twice by then (brought to a pc specialist that's also what he did), cleaned my PC of dust and swapped ram. I did a lot of things, and I definitely don't think it's a software issue. My only guesses would be either damaged RAM or GPU (which I don't want to believe that GPU is damaged it's not even a year old yet). I did a memtest86 for a few mins a week ago, found some errors so I might do one again tomorrow. I also don't think it's an overheating issue, because sometimes the pc reboots even before the components get warm enough. I honestly need some  help guys, I'm not good at this stuff and I've tried as much as I could by myself. My specs are attached 

[Aree Soothsayer]

The psu dying could have sent a minute surge of power into your system damaging Mobo, Ram, Cpu, a combination or all of them. I had a bad mobo damage all 3 of mine. 

There is something you can try. Underclock the cpu, ram and bus speed. It was how I got mine stable until I could replace the parts.

[Python350]

54 minutes ago, Aree Soothsayer said:

The psu dying could have sent a minute surge of power into your system damaging Mobo, Ram, Cpu, a combination or all of them. I had a bad mobo damage all 3 of mine. 

There is something you can try. Underclock the cpu, ram and bus speed. It was how I got mine stable until I could replace the parts.

I will try doing so, may I ask what is bus and how do I underclock it? I'm also guessing I need to underclock ram through BIOS

[Aree Soothsayer]

Bus speed is the base speed of the pc before multipliers are added. You can usually find it in the Bios as well.