I've been doing tests with my cpu voltage to find out is it problem with my voltage.
Mobo: ga-n650sli-ds4
Cpu: core 2 duo e4300
Ram: 2x1 gb
350W psu
Windows 7 32 bits
I tried different voltages on 200mhz x 9 multiplier and stress tested
Voltage: 1,3V
Time until freeze: 01:56
Temperature: 56...