I've just upgraded from my i3 2130 to an i5 3570k and I'm having no problems at all with my 160W Pico PSU.
I've removed my dedicated graphics card and the temperature of the i5 is actually lower than the i3 now. This is down to the fact the graphics card was putting out a lot of heat and raising the cpu temp of the i3.
I've removed my dedicated graphics card and the temperature of the i5 is actually lower than the i3 now. This is down to the fact the graphics card was putting out a lot of heat and raising the cpu temp of the i3.