Depends if you getting a Dual Core or Quad core and if your MB can support it. Also is your MB for AMD or Intel and which Brand of CPU are you getting (AMD or INTEL)?
What Socket MB have you got and what Socket CPU have you ordered?
Also with the Quad's you will need a Heavy PSU (700+) depending on what your running and if you use the NVidia MB then you need a Good 850+ (Enermax or the like).
