My Dell Inspiron E1505 has an Intel 1.66 Ghz/2 Mb/667 Mhz (T1300) solo core CPU. Last week my computer stopped booting (you can read my post about it under Mobile Computing) and I believe the problem is either the CPU or MoBo. I may end up replacing both. So my question is do I need to replace the CPU with a solo core with same specs or can I upgrade to a dual core CPU? It seems that it is not that easy locating an Intel CPU with same specs and solo core. Also, can I up my processor and/or bus speed and if so will a higher CFM fan be needed? Would it be better to try a new CPU and then MoBo (if CPU is not the problem), MoBo and then CPU, or just purchase a new MoBo with CPU included?