As far as I'm aware, the entire POWER9 design is available for licencing for $$$. The only obstacle to fabbing it yourself would be that it's designed to be fa

As far as I'm aware, the entire POWER9 design is available for licencing for $$$. The only obstacle to fabbing it yourself would be that it's designed to be fabbed on GF's 14HP process, which incorporates some IBM-proprietary fab technology which was transferred from IBM when they spun off their own fab to GF; thus AFAIK the GF 14HP process is only licenced for IBM's use. Since IBM is willing to licence POWER9, perhaps they'd also be willing to negotiate access to the process. (GF 14HP is different to GF 14LPP, which is what other GF 14nm customers (e.g. AMD Zen) use.)