using prime how do i know when my system is stable?

[Tbirdkid]

How long should I do prime? How will I know if something is wrong? I am questioning my memory now but not sure... help me out. Thanks

 

[Sammy5000]

Prime95 - Over 12 hours w/o errors (best bet would be closer to 18-24 hrs)
Memtest86 - A few hours (usually memory errors pop up pretty quick)

 

[Tab]

I let booth run overnight, which is 8 hours... Never had my computer freeze, except for some apps

 

[hurrikaane]

If you can run prime overnight you got a damn stable system.

 

[Corporate Thug]

i go for 24 hrs