I recently rebuilt my pc with a 2600x that ive had for a few years now into a new case. recently ive had issues with my computer just black screening after a few hours of gaming. at first i had an issue where it would do it alot more frequent because i turned my memory from auto to the amount of mhz it holds ( i have 3000 mhz and 3200, i turned it to 2993) and it shut down on me ALOT. like 4-5 times a day. when i turned it back to auto it has it at 2100mhz and it doesnt shut down nearly as much but still does. i have a 2600x cpu, 750 w psu, corsair aio cooler 240mm , b450 mb, 32 gb of ram, 4 corsair fans. im just trying to narrow down the issue, maybe some people have had similar issues or some type of way of running a diagnostic, its hard for me to figure it out cause its not very frequent, usually if i play for about 3-4 hours consistant it does it once or twice after a few more hours, my cpu doesnt get above 55 degrees or so on high load, when it crashes i dont get a code but my mb throws a cpu code, the cpu and mb have been used for 4-5 years of consistant gaming so im wondering if its maybe just getting to its end? idk how long they last for