[SOLVED] My new computer keeps turning off then turning right back on again! Please help!

[Smokey-]

Hi, I just recently built a new computer and after about the first week of using it, it started randomly restarting. It would completely shut off, then turn itself back on within about a second. I noticed that it happens mostly while playing games, but sometimes it will do it even if I'm browsing the internet. I got a little frustrated with it, so I ended up exchanging the parts with new ones, I started with my Ryzen 7 3700x and exchanged it for an Intel core i7 9700k with a water cooler. It was still persisting so I exchanged the RAM and power supply for new ones (same RAM and PSU, just for new ones). The problem still persisted so just yesterday I returned my RTX 2060 with a new one, yet the problem is still occurring. I exchanged almost every single part in here besides the case and the HDD & SSD. My temps are running perfect no matter what I'm doing with my computer, when the PC restarts, it has no Blue Screen of Death, it doesn't come up with any type of error code, it just completely shuts off, then turns right back on and brings me to the windows login screen. I turned off automatic restart with system failure, but the problem bypasses it, unticking it did nothing for me, and too add, nothing is overclocked in my PC as well. Hopefully we can work as a team and get this figured out, not just for me, also for the people who have this problem as well, or who will have it in the future, thank you!!

PC Specs -

PSU - Corsair CX750M (750 Watt Semi-Modular)
CPU - Intel Core i7 9700k
Mobo - MSI Z290 Gaming Plus
RAM - Corsair RGB Pro Vengeance (3200 MHz)
Graphics Card - RTX 2060 Twin Frozr 6GB
Water Cooling - Corsair H100i RGB Platinum
HDD - 1 TB Western Blue
SSD - SunDisk SSD Plus 250 GB

 

[Smokey-]

Like cpu connectors and pcie are different even though they look the same.

Yes, I'm 100% sure all cables are properly hooked up and everything is in the correct place. This is about the 5th computer I've built so I have a good understanding of what to do when building one. It just restarted again after being in a Rocket League match for less than 3 minutes. I 100% agree, it seems impossible for it to persist like it is, even tho I've literally exchanged every part. I am completely baffled.