Hey I have toshiba satellite s55-a5169 with gt 740m. I want to know is it possible to upgrade this laptop with gtx 680m because is so much better for gaming?
You cannot upgrade the GPU. It is soldered into the motherboard.
No it's not. The intel hd 4600 is soldered into the motherboard not GT 740m
The HD4600 is integrated into the CPU, which is soldered onto the motherboard. Also the GPU is soldered onto the motherboard. Only more expensive/exotic laptops have CPU's or GPU's that can be replaced. For this laptop you cannot upgrade neither cpu or gpu.