It's old but along the same lines; more stories of industry pioneers: Accidental Empires: How the Boys of Silicon Valley Make Their Millions, Battle Foreign Competition, and Still Can't Get a Date (1992, 1996).
The passmark numbers are almost identical to a 12th-gen intel i7-12700K, however the still-modern 12-core intel cpu has to pull about 4x as much power to do it.
Customs can certainly approach you any time right up to the gate. In 2010, my wife and I were approached by an agent and asked very directly if we had more than $10,000 in USD cash with us as we waited at the gate to board a nonstop flight from the US to Moscow. We answered truthfully "no" in a brief conversation and he wished us well almost immediately.
I don't think he suspected we were money launderers. My guess is that upon hearing both of us speak, he easily determined that we were not natives of Russia and thus not, for example, carrying but not declaring a substantial amount of cash intended for family back home.