I change the voltage of my ram from 1.95(default) to 1.8. Is these ok? because my pc always freezes. I think it might be the solution. i didnt over clock any thing in my pc. i always choose optimized defaults in bios.
firstly find out the specs of your ram you can use cpu-z and then look under memoy tab, then find out what speed they are running at, then make sure they are running at the correct voltage for that speed.
1.85 is fine all they need to operate at stock is 1.8. you need to check that its not your cpu at fault, download orthos and run for 4hours at the same time monitor your cpu temps with coretemp. if your temps reach over 70c then stop orthos and you need to buy a better cpu heatsink or reseat the one you have with some as5(artic silver 5).