* Ampere MSRP $5.5K vs $15K for the EPYC.
* Turin 196 had 1.6x better performance
* Ampere had 1.2x better energy consumption
In terms of actual $/perf, Ampere 192 core is 1.7x better than Turin Dense 196 core based on Phoronix's review.
So for $5.5k, you can either buy an AmpereOne 192 core CPU (274w) or a Turin Dense 48 core CPU (300w).
Ampere has a 256 core, 3nm, 12 memory channel shipping next year that is likely to better challenge Turin Dense and Sierra Forest in terms of raw performance. For now, their value proposition is $/perf.
Anyway, I'm very interested in how Qualcomm's Nuvia-based server chips will perform. Also, if ARM's client core improvements are any indication, I will be very interested in how in-house chips like AWS Graviton, Google Axion, Microsoft Cobalt, Nvidia Grace, Alibaba Yitian will compete with better Neoverse cores. Nuvia vs ARM vs AmpereOne.
This is probably the golden age of server CPUs. 7 years ago, it was only Intel's Xeon. Now you have numerous options.