That was a comment on how impressive they are, not a question. ;-)
Sorry.
PowerPC and the z-Architecture (successor to the 360, 370, 390, ...)
Minor nitpick: IBM abandoned PowerPC. Their "low-end" servers are all POWER.
... the ones that only IBM uses in their computers.
You might buy a POWER machine from a boutique manufacturer other than IBM but there were other major players such as Motorola, Apple, then later Nintendo: Nintendo adopted with the GameCube, then Wii, but IBM made custom chips for the XBox360 and the PS3, Nintendo still uses POWER in the Wii U.
The CPUs that handle 86% of all credit card transactions for example (in the various mainframes IBM builds). Pretty nice modern architecture still capable of executing 60 year old code.