Hello everyone! First off I want to apologize because I do not know all too much about computers, but I do love gaming on them. I am in the Army and finally had enough saved up to get a new computer. I bought an Alienware X51 desktop about a year ago and I want to begin upgrading it some. I am worried because the X51 has a very small case and I don't know what will fit or if I can even trade it out for a bigger case. I was thinking of getting the GeForce 1070, but not sure if it'll fit or even work with my computer without overheating it too bad. I am not sure about what PSU is needed or cooling. I am very new to all of this.
CPU : Intel Core i7 4790k @ 4.00Ghz
Ram : 16gb dual-channel DDR3 @ 800MHz
Motherboard : Alienware 0PGRP5 (SOCKET 0)
GPU : GeForce GTX 960 2047MB
I used piriform speccy to get this information. I apologize again for asking. I just don't want to waste a lot of money and mess up my system.