thx@all

another question :
i have my sistem working on a benching table and yesterday i was trying to resolve a problem with some cables and i touched the rear of my motherboard causing the sistem reset, i tryed to touch pcb andmove it casusing another reset.. can be a ground problem ? i have the motherboard on the benching table without all support for the motherboardand maybe if someone is miss can cause that ??

or can be ?