@Kevbob45 Please note, all the advice given here so far is to allow you to use PCS's upgrade service - if you wish to install a new GPU yourself (without any input from PCS), you are free to do so (at your own risk). From your posts, I didn't think this was your intention so didn't mention it earlier.
But if you do the research, you can determine whether you can upgrade your GPU yourself and if its marginal, take the punt and go for it. But as said, its at your own risk.
But if you do the research, you can determine whether you can upgrade your GPU yourself and if its marginal, take the punt and go for it. But as said, its at your own risk.