My PC freeze with 4gb ram but not with 2gb ram.

[vickyhundal0004]

I have motherboard N68s by ASRock .
I was using 2gb 800Mhz RAM now I have added a another RAM of 4gb of 800Mhz .
Problem is this that my PC freeze with 2+4 gb RAM also with 4gb RAM .
But it works fine with my 2gb RAM stick.
Plzzzz help......

 

[yuichi03]

Wow that memory stick sounds old. They tend to go bad and can even cause processes to crash or even reboot your system. I think that 4gb memory stick's gone bad.