That was my deleted comment, but then I realized the article specifies they are Rome CPUs (Zen 2), while the 4000 series of EPYCs is based on Zen 4

Potentially the same thing, assuming PCIe 2 x1 provides enough bandwidth.

Nobody’s saying that Google won’t give them the code, though. Nothing is moving to closed source, Google just isn’t going to be showing the current work-in-progress code for the next release to the public.

How so? I doubt many ROMs are based on code that isn’t part of an Android release. Surely GrapheneOS devs can just use the Android 16 branch once it’s released to make an Android 16 version of GrapheneOS.

Not in the CPU/modem department, that’s a first

I don’t think overheating would cause random corruptions (it should throttle down when overheating, and then shut down if the temperature gets too high even when throttled, but there should never be an incorrect result of any computation), and surely the RAM will run at the standard 2133 speed on default settings - OP says they reset the BIOS settings to default between CPU swaps.