I've heard that some CPUs are made of good silicon which allows them to overclock better than others. So how to check CPU on luck? I hope you understand what i mean 😀.
Sorry for my bad english
No way to do it without trying and see how it goes, same thing for video cards and memory.
There are some CPUs that are better known for overclocking than others, you can do a web search for "good overclocking CPUs" and see what comes up.
both of them our correct. Make sure you read a guide a few times don't attempt it until you understand what your really doing as well as understand how to voltage works.