Unable to Turbo boost Macbook Pro I have MBP 13" 2012, my cpu 2.5 Ghz up to 3.1 Ghz but when I use Intel Gadget, the cpu only reach 2.9 Ghz on render and heavy use situation. Is it possible to make cpu reach 3.1 Ghz by terminal command or by an application ?
3,1GHz is a single core maximum. Like when running prime95 on one core. 

http://www.intel.com/content/www/us/en/architecture-and-technology/turbo-boost/turbo-boost-technology.html
Intel has a sneaky way of suggesting that it will work on all cores under some conditions but that's just advertising unfortunately.