I have a dell Inspiron 530 and I need a new CPU. It currently has a g33m02 motherboard and a 300-watt power supply. The CPU is an intel core duo e4300. Would a duo e8500 work in the 530? If not, how about the Pentium e5700. If both don't work could you list some CPUs that do? I would prefer not to upgrade the PSU.