My sister has a HP elitebook 8560w with a Nvidia 1000m. It is removable and was thinking of maybe upgrading the gpu because it does have a decent cpu in it. Where can you purchase one and would it be worth it? The CPU is a i7-2760qm and 8gb ram with two empty slots. I know there is a mobile 1050 ti and that is what I think would be perfect for this computer if possible