So i bought a Toshiba Satellite A105-S1712 about a month ago off craigslist for the incredible price of 95$. The person sold it because it had a virus, I easily formatted the comp, to XP. Over the month, I replaced Keyboard and Battery. I also added 512MB of ram. Question. I checked the socket and found that this processor, " Intel Pentium IV/4/P4 CPU 2.4GHz, SL6RZ PPGA478 Intel32 '533 MHz Fits onto my laptop. Right now the processor is an Intel Celeron 1.6Ghz '400MHz, Now I am wondering, If I go through the trouble of replacing this part, Will I notice a difference in computer speed, and game speed. I am hoping to resell this laptop some time, and could possible sell for a lot more money than I paid for it. The processor is only 12$. Thanks for answering, also other upgrade alternatives will be appreciated. 'Links will take to the Specifications page.