Top c - CPU usage >200% Will it Crash?

view story

http://unix.stackexchange.com – I would appreciate some advice from your experience..My main concern is I really REALLY do not want to cause the computer server to crash.. The question is, I am running a program on a linux computer server(super-computer?? maybe..). The program I am running is able to specify the of thread which can be used. I specified I would like to use 15 thread. The computer server I am using has about 20+ processor (Intel Xeon CPU with 6 core). From top c, I saw that from running my program I am using %CPU 190.7% So I proceed to check with top c (1) and below is the output Cpu0 : 0.0%us, 0.0% (HowTos)