IBM Redbooks highlighting
POWER9
processor-based technology
IBM's new Power System E980 and E950 servers top off the POWER9 family with scalability of up to 64 TB of memory, up to 192 POWER9 technology based processor cores, and PCIe Gen4 I/O expandability. They are designed for industry leading reliability, scalability, serviceability, and manageability.
The following enterprise and scale-out Technical Overview and Introduction Redpapers provide more information about key IBM Power System server offerings:

IBM Power Systems E980
This IBM® Redpaper™ publication gives a broad understanding of a new architecture of the IBM Power System E980 server that support IBM AIX®, IBM i, and Linux operating systems. The objective of this paper is to introduce the major innovative Power E980 offerings and relevant functions:
IBM Power System E950
The following IBM® Redpaper™ publication gives a broad understanding of a new architecture of the IBM Power System E950 server that support IBM AIX®, and Linux operating systems. The objective of this paper is to introduce the major innovative Power E950 offerings and relevant functions:

IBM Power System IC922
Engineered for AI inference, the IBM Power System IC922 provides the compute-intensive and low-latency infrastructure you need to unlock business insights from trained AI models. The POWER9-based Power IC922 provides advanced interconnects (PCIe Gen4, OpenCAPI) to support faster data throughput and decreased latency. Accelerated, the Power IC922 supports up to six NVIDIA® T4 Tensor Core GPU accelerators.
IBM Power System AC922
IBM Power System AC922 server (8335-GTH and 8335-GTX models) is the next generation of the IBM POWER® processor-based systems, which are designed for deep learning (DL) and artificial intelligence (AI), high-performance analytics, and high-performance computing (HPC).
This paper introduces the major innovative Power AC922 server features and their relevant functions:

Scale-out AIX, IBM i and Linux servers
Power Systems are focused on reliability and performance. The updated scale-out servers use IBM POWER9 processor-based technology, which is a technology that is designed for data-intensive workloads, such as operational databases, advanced analytics, and business applications.
The new IBM Power Systems scale-out servers, which are powered by PCIe Gen4 switches, deliver seamless and lightspeed throughput I/O among multiple on-premises and public clouds applications, and cloud-like agility and economics by supporting IBM Power Enterprise Pools 2.0.