Hello, I have a HP Envy 17 3200 CTO 3D Edition. I have upgraded my CPU to an Intel Core i7 3940XM and my RAM to CORSAIR Vengeance Performance 16GB (2 x 8G) 204-Pin DDR3L 1600/PC3L-12800. I currently have a Radeon HD 7850M GPU, and I would like to swap it out for something with a little more juice and at least 2GB of video memory. I can't seem to find any adequate upgrades and don't really understand mobile GPU socket types. If anyone can help a little, it would be very much appreciated. Thanks in advance!