Russian PC makers cannot get Russian CPUs from TSMC, other foundries.
tl;dr: Intel and AMD are not selling their processors to Russia, and processors from Russian companies cannot be manufactured as Taiwan is banning TSMC from doing so, while Russia can only produce chips up to a 90 nm process.
The first statement is before opening the article and discovering these events are rather old and the war has proceeded regardless.
Ah, got it. Thanks!