Hi, I just have few questions regarding this project; I am posting here because y'all seem to be expert at this category. I've never touched a project like this before, that's why taking some precautions and asking over here at the forum. I have a Dell xps 15 L502x; 2.00Ghz Turbo boost 2.9 i7-2630QM (basically a piece of garbage) with GT540M and intel HD 3000/ 8gb ram (Optimus Prime technology -.- yeah right it doesn't even switch graphics card properly while gaming) here's my topic I need help with: I am new to this and I am not sure whether to go through with http://forum.techinferno.com/diy-e-gpu-projects/2824-%5Bguide%5D-dell-xps-15-l502x-gtx650ti%40x1-1opt-pe4h-pm3n.html this guide and get the old pe4h instead of the new pe4L. If pe4L, do I need to install the setup 1.x from somewhere? I am a bit confused. And also what gpu+psu combination do you folks recommend ? Thanks for helping the newbie! Buhnanafone