Hi, can i upgrade CPU on Toshiba Satelite c850-12x, it has intel pentium b960 CPU, with socket g2, 988b rPGA? I saw many variants with this socket like i3, i5, i7, i wonder if bios will accept any other cpu?
You would have to ask Toshiba really.
Maybe if you download and run CPU-Z it will give you a motherboard model and can be searched if it can be upgraded, but the BEST upgrade you can do is to remove the HDD and put in an SSD, that will bring it back to life
The CPU is a PGA fitting so it is removable (many laptop CPUs are non-removable BGA fitting). However, you'll need to ask Toshiba for specifics of which CPU models are supported by the motherboard's BIOS as, unlike retail desktop boards, that information is generally not published online.