Question GPU upgrade for my dell vostro 5648

Jan 5, 2021
so i have this laptop for 3 years now and i wanna upgrade its gpu,but its an internal motherboard and i dont know if any othe gpu will fit,i have upgraded ram to two 8gbs=16 gb and maybe ill switch out the battery and add an ssd....i would buy a new one but if i can upgrade my gpu i dont think i will need to buy a newer laptop....i have two gpus currently a intel graphics 620 and a NVIDIA geforce 940 mx and the crore is an intel i5-7200 u