https://www.ibm.com/power/operating-systems/linux https://www.ibm.com/Search/?q=power9 https://twitter.com/ibmpowerlinux
As to common competition CPUs near or above, other than Intel/AMD x86 and killed off IA-64, and neither retail or open, are current SPARC based. Other things to play with are on the list... https://en.wikipedia.org/wiki/List_of_Linux-supported_computer_architectures Fujitsu SPARC XII http://www.fujitsu.com/global/products/computing/servers/unix/sparc/lineup/m12-1/ http://www.fujitsu.com/jp/documents/products/computing/servers/unix/sparc/events/2017/coolchips20/CoolChips20-rev8.pdf https://www.nextplatform.com/2017/04/05/fujitsu-takes-ibm-power9-sparc64-xii/ Oracle M8 https://www.oracle.com/servers/sparc/t8-1/index.html http://www.oracle.com/us/products/servers-storage/sparc-m8-processor-ds-3864282.pdf https://community.oracle.com/servlet/JiveServlet/previewBody/1017902-102-1-163307/T8M8_Architecture_WP_20170914.pdf https://www.nextplatform.com/2017/09/18/m8-last-hurrah-oracle-sparc/
