Help Strix G513 Random Shutdown

[Epoctis]

Specs:
ASUS ROG Strix G513 Advantage Edition
AMD Ryzen 9 5980HX
AMD Radeon RX 6800M
(x2) 16gb DDR4 SDRAM

Issue:
The computer will hard shutdown intermittently while under heavy load. It does not restart. System event viewer shows a 6008 unexpected shutdown.

Troubleshooting Steps Taken:
Repasted thermal paste with Noctua Nt-H2 and cleaned interior
Using a cooling pad
Unistalled Armory Crate
Used HWinfo to confirm not overheating or throttling at time of shutdown
Computer passed OCCT CPU and Power stress tests
Power throttling to 45W for CPU and 145W total
Undervolted by -1 in GHelper and restricting temp control to 85 degrees Celsius
Computer passed Microsoft RAM diagnostics
Factory reset computer

Notes:
I'm not very tech savvy but I have been trying to resolve this issue for a while. It started about two months ago, the computer was hard shutting off while playing New World, Ark: Survival Ascended, and Diablo 4. All pretty heavy games in their own right so I immediately thought it was overheating, that seemed logical to me. I started watching the temps and sure enough the temps were rising to 94-96 degrees Celsius (which seemed awfully high to me), but I read that for this AMD CPU, that temp is high but not in the range of hard shutting down. I read the manufacturer shut down limit to be 110 degrees. Additionally, the machine would run at that constant temperature for a random amount of time before shutting down with no consistent pattern suggesting a certain point of overheating. I even got lucky twice to be actively looking at the temperature in HWinfo when the shutdown happened and confirmed it was consistently at 94 degrees. Nonetheless I repasted the CPU and GPU since the liquid metal had been pushed to the side (thermal paste should be better than half applied liquid metal, I thought). At first I thought that solved the issue but within a few days it was back to shutting down intermittently. The GPU stays at around 60-70 degrees under load as well, so I didn't suspect it.

So, I am now at a loss at what to try next. I read that a bad power supply could be causing this but I am confused on how the battery wouldn't take over in the AC adapter is plugged in and the device shows a full charge rate in HWinfo.

Any suggestions or ideas are welcome. As mentioned, I am not very tech savvy, I have just been following guides and trying to think logically about it.

[Epoctis]

I cleaned off all of the old paste/liquid metal, that should all be the new paste that I applied three weeks ago. So you think the paste is not up to the scale of the heat of the machine? I can replace the CPU and GPU with liquid metal, do you have a recommended one? Otherwise, I'll likely get the Thermal Grizzly brand. The reason I didn't use Liquid Metal initially is because I read and saw myself that the contact of the heat sink is not very good. I read that was very important, as you suggested as well. So, I got the non-conductive paste and tried to cake it on to increase contact. 

Is there anything else I can do while I have the machine open to increase the cooling of the units? I read about desktops having water cooling systems and more airflow, but what could I do for a laptop that you think may make a difference for the temperatures?

[ElectroStingz]

Yeah definitely, the way it is spreading out leaving it thinner near the center shouldn't happen as the heatsink applies even pressure over the entire CPU/GPU so you need something that can stand the heat. Thermal Grizzly is a good choice.

Take the fans out and give them a good clean, dust free as clogged fins / blades will not move much air.

Other than that laptops will always be limited so other measures are user preference, like 60FPS, lower core frequencies or reduced boost but one thing at a time get this power down issue resolved first.

[Epoctis]

Thank you, it will be a while before I will be able to do the suggested steps but I will update once completed. Is there anything else I should be considering or troubleshooting in the meantime?