I have a now about 11-year-old Toshiba Sattelite A505-S6979 laptop and while I am surprised it still works sometimes,I paid a lot for it back in the day so it had better. Still, It's little Mobile Core 2 Duo can barely keep up with anything now, I am often seeing it pegged at 100% while just using Firefox. I have done some online searching and know I can probably slot in a Mobile Core 2 Quad in either the Q9000 or Q9100 variants, which I can get on eBay. The only major question is whether the power delivery and cooling system can handle it. I have not been able to find anyone online that have done this to this particular laptop so I am going to Tom's Hardware community and maybe even a couple of others to ask. Someone has to either have knowledge, experience or can make a good educated guess based on experience in something similar. Thanks ahead of time for any response.