citation needed
Google Soviet engineer Intel and look at https://en.m.wikipedia.org/wiki/Vladimir_Pentkovski
His achievement is overstated in Russia (mainly from the urban legend that his surname led to Pentium). He is a great engineer, but Intel never had a shortage of people of his caliber.
From his Wikepedia page:
> At the beginning of 1990s, he immigrated to United States where he worked at Intel and led the team that developed the architecture for the Pentium III processor
In the same manner that the US space program would have advanced without input from Wernher von Braun [2], the development of Pentium III would have happened minus Pentkovski, though their presence pushed development faster and in directions that the projects would have taken longer to reach without them.
[1] https://en.m.wikipedia.org/wiki/Pentium_III [2] https://en.m.wikipedia.org/wiki/Wernher_von_Braun