When putting together a new machine, it's a good idea to stress test the CPU (including all its cores) and get it to generate as much heat as possible. Here's some tools I've used
- CPU Burn-in
This tool is specially designed to make the CPU emit as much heat as possible. Run one instance for each logical processor on your machine.
- Stress Prime 2004 Orthos Edition
Prime95 is well-known to be a CPU stability stress tester. This is based on Prime95, but conveniently stresses all your logical processors in one package.
- Super PI Mod
Yet another stress tool. Here's some same instructions on using it to stress multiple cores.