Hello, do I need a special power supply to run an Intel e8400 cpu? I know this might be a stupid question, but I'm about to upgrade my Dell Inspiron 530. Right now, it has an Intel Celeron 450 with 2.2 GHZ (1 core) and I'm upgrading to an Intel duo core e8400. I already bought a new heatsink but am not sure if I need to also upgrade the power supply to something more than 300 watts. Thanks!