Quote Originally Posted by Particle View Post
The black screen thing is pretty common due to the following list. You are more likely suffering from something else being wrong than the CPU:
- Insufficient PSU. A rail overloading will either cause a cheap PSU to deliver under voltage / smoke or a quality PSU to shut down one or more rails to protect itself.
- Bad motherboard. A part, such as the voltage regulators, may be triggering a PWM shutdown due to overheating.
- Insufficient motherboard headroom for the targeted overclock. The failure mode is the same as above, but due not to a failure of the mobo but rather draw being too far out of spec.

I've seen all three of those things cause it in the past. Getting a bad CPU is exceedingly rare since they're all individually tested at the factory to not only make sure they work, but to "bin" them for use as different models. Straight-up "bad" CPUs that can't do what they're sold at are virtually unheard of. It's almost always insufficient or bad supporting hardware or an error in installation.
Well, I thought about number 1 too, as I do only have a HX520 which has 3 18A rails and that might not be enough for more than 3,6GHz.

Concerning 2&3, if I do only overclock via multi, do they also apply? I just don't want to buy a stronger PSU in vain.

Thanks for you help
Soya