Hi all--

As the title states, I have an Alienware 17 R1. I was running an Nvidia GeForce GTX 860m (Kepler) until it stopped working a couple of weeks ago. I'm getting a Code 43 and no amount of driver rollbacks seems to help. SO, I'm coming to terms with replacing it. 

That being said, if I'm going to be replacing it I'd mind as well upgrade it. Can the system fit a more powerful GPU? How much more powerful? All the lists I've seen don't even include the GPU I purchased it with as "compatible."