nasiel som toto: aj ked je to zrejme global setting

< ncpus > N < / ncpus >
Act as if there were N CPUs; i.e. to simulate 2 CPUs on a machine that has only 1. To use the number of available CPUs, set the value to -1 (was 0 which in newer clients really means zero to e.g. only allow GPU computing).
http://boinc.berkeley.edu/wiki/Client_configuration

e: to je teda zrejme aj moznost, ktoru si mozes zvolit aj priamo v client sw jednoducho tak, ze zvolis 0 procakov, ktore moze boinc vyuzivat pre pocitanie.