Upgrading Alienware x51r2 PSU

GreekSpartan1234

Commendable
Apr 15, 2016
8
0
1,510
Hi, I've heard of people using internal psu's with their alienware x51 r2's to provide more than 330 watts of power. How can I do this, and what would I need. I mainly want to do this so I can upgrade my graphics card, and yes I realize I will need to mod my case or move it to a new one.
 
Well when I opened it I saw a motherboard and a couple smaller "daughter" boards. The mobo has a 6 pin connector that attaches to the external psu. If i get an internal psu, can I just attach it to that same spot?