There were rumors that Swiss police could even confiscate your car because of speeding. Standard speed limit = 80kmh on country roads! Highway = 120kmh.
Fines start from 40CHF (1-5 kmh above the limit) and raise fast to CHF 180 or CHF 260 when 15-20kmh above the limit.
As a foreigner I would not mess too much with their system.