Best Owner-Controlled Qubes Secure Motherboard Recommendations

[FranklyFlawless]

@OwnQ

Is the following state of owner-controlled Qubes systems sadly true or am I missing something?

Yes, in addition to this:

QSB-107: Multiple CPU branch prediction vulnerabilities

Last time I tried to cover this was Short list of laptops/desktops that work well with Qubes OS - #245 by Insurgo for older hardware. Reading this, we can now infer that Intel gen 8th CPUs and less recent, not receiving microcode updates and thought to have transient/speculative vulnerabilities mitigated by Xen, HT being off and older microcode updates were enough to mitigate the risks documented in QSBs. This is not the case anymore. I have opened QSB-107 - Multiple CPU branch prediction vuln…

@OwnQ

Got any insights or recommendations on selecting an owner-controlled secure motherboard for Qubes OS in 2025?

Only if you are willing to port Qubes OS to POWER9.