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My ubuntu system (Ubuntu 18.04 Server) keeps crashing. The error is above. It shows up different every time. I have a Core-i7 2600K. Does anybody know why? Can I add more detail here? I feel like I can, I don't know how.

Terrance
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    Judging by the CPU 3: Machine Check Exception: 5 Bank 3 listed there, you might have a bad RAM stick. See: https://askubuntu.com/questions/605369/mce-hardware-error-machine-check-events-logged-appears-in-syslog-what-sho – Terrance Jul 06 '18 at 00:01
  • @Terrance Remount RAM? Its running fine as of now, I had the CPU turbo set to 4.3 GHZ and the i7 2600K's Max turbo is supposed to be 3.8 so i underclocked the Turbo clock. If the crash happens again ill try remounting RAM. Right now im playing terraria on the computer. Its being utilized as a server. –  Jul 06 '18 at 00:10
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    You can try reseating / remounting the RAM. I can also see overclocking causing RAM failures. With overclocking good cooling is a must! – Terrance Jul 06 '18 at 00:12
  • Good cooling indeed! 35C Idle 50C Load. I just got the cooler today. Thats why I have the terraria server now. Before i was hitting 80-90 with the stock cooler at which point i would shutdown. so i got this new cooler the Noctua NH D9L. –  Jul 06 '18 at 00:14
  • If cooling solved the problem then please delete the question. This question is then hardware related and off topic here. – user68186 Jul 06 '18 at 02:03
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    I'm voting to close this question as off-topic because it is hardware related. – user68186 Jul 06 '18 at 02:04
  • Did your server use to work fine and just start crashing after an update? – WinEunuuchs2Unix Jul 06 '18 at 02:26
  • @PythonDude29 I'm confused. Are you saying all the problems are solved now by installing thermal management system? If so then your question will be closed as a hardware problem. – WinEunuuchs2Unix Jul 06 '18 at 02:28
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    Guys, hardware issues are not off-topic. Per Seth, "All it has to do to be on-topic is run on Ubuntu." – wjandrea Jul 06 '18 at 03:16
  • GUYS, CALM DOWN. It was not the cooling that solved the problem, it was merely the cooler that motivated me to do stuff on my server. See my answer below. –  Jul 06 '18 at 10:14
  • None of these comment answers are correct except the part about overclocking causing RAM issues and CPU issues. It was not the Cooler, not an update, the boot itself says Hardware Error. But the hardware error's roots are from the bios over-turboing my cpu as in my answer below. –  Jul 06 '18 at 10:28
  • @Terrance The MCE hardware error page you linked me, the top answer says that one of the problems could be "running your system out of specification" aka ASUS running the cpu with max turbo of 3.8 GHZ at 4.3GHZ –  Jul 06 '18 at 10:34
  • I'm voting to close this question as off-topic because it is BIOS-related, not Ubuntu-related as per OP's answer. – Fabby Jul 06 '18 at 12:47
  • @PythonDude29 Yep, running it out of specification can definitely do that. Unfortunately, just looking at the pic you have here posted, I could only come up with the guess based off the pic and nothing more. – Terrance Jul 06 '18 at 13:52

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My problem turned out to be that ASUS's "Optimized Defaults" were just garbage, causing my Core i7-2600K, with a max Turbo Speed of 3.8 GHZ to try to turbo all the way to 4.3 GHZ, therefore causing the cpu to stop working, then the computer shutdown and rebooted repeatedly. When I discovered this, switching through the BIOS, I turned it off and as far as I can tell, it works now. I ran a stress test overnight and its still on this morning with a max temp of 60C.