There’s plenty to like about the POWER8 architecture: high speed interconnections, large (and flexible) core counts, and support for lots of memory. POWER9 provides improvements in all of these areas and it has learned some entirely new tricks as well. Here are my top five reasons for getting excited about POWER9: NVLink 2.0 In the simplext terms, NVLink provides a very high speed interface between CPUs and GPUs with very low latency.