I have a Toshiba Sattellite L855D-S5117 and I am looking to upgrade the CPU. I have already upgraded the memory and in the future, I am going to upgrade the storage. I have never upgraded or installed a CPU before, so I need some help. Does anyone know if it is possible to upgrade an AMD A8-4500M to an Intel Pentium G3258 3.2GHz on a laptop? I've read the reviews and believe that that CPU is the best possible option for my budget. That's all I need. Any help is appreciated. Thanks!