If it’s doing this right at boot up even after a reset / clean install of the OS then it’s likely a hardware failure. You can run diagnostics also, see: https://support.apple.com/en-us/102550.

Take it back and get a different one.

Even when I know what I want I cringe with the 90% scammy apps in the search results.

Option 3: No MacRumor, 9to5apple, and other spam blogs. No conflict of interests and the forum will have higher SNR.

Two cases:

• Need more RAM than the platform supports. This rarely happens now it’s fairly easy to get 128GB or more in consumer hardware. Before had to get workstation motherboards full of RAM slots.
• Platdoem doesn’t support the latest graphics card / too cou limited for. This again rarely happens.

If I need CPU performance I just use remote workstation/cxluater in the cloud. Way cheaper.

Because it’s expensive, and technology and standards change too quickly. How big is big enough? How fast is fast enough? Are motherboards going to design every path to support 5Ghz? Every path to support 180w of power?