On: IBM debuts sub-1 nanometer chip technology

[ternaryoperator]

Their line of POWER chips are used in their mainframes

[lizknope → ternaryoperator]

No, their mainframes use the zArch which goes back to the System/360 from 1964.

https://en.wikipedia.org/wiki/Z/Architecture

IBM sells huge servers with POWER architecture CPUs but they are not what people are referring to when they talk about IBM mainframes.

[ternaryoperator → lizknope]

Ah, thanks for the correction.