I checked Lenovo support site for the specification of your laptop. Just go with a RAM upgrade rather than a video card upgrade because it's tricky to find an upgrade graphics card specially for laptops. You'll need to consider the power supply and if your motherboard can really be upgrade with a GPU.
Your laptops RAM can be upgraded up to 8GB that would really help specially with games and would make it run faster as well for browsing and multi tasking.
I checked Lenovo support site for the specification of your laptop. Just go with a RAM upgrade rather than a video card upgrade because it's tricky to find an upgrade graphics card specially for laptops. You'll need to consider the power supply and if your motherboard can really be upgrade with a GPU.
Your laptops RAM can be upgraded up to 8GB that would really help specially with games and would make it run faster as well for browsing and multi tasking.