Currently in my computer is a fairly ancient Dell Inspiron 531 motherboard with an AMD Athlon 64 dual 5000+, and 2gb of DDR2 ram. My graphics card is a Powercolor Radeon HD 6670, specifically the one with 1gb of DDR3 ram. Obviously this setup will not run Fallout 4 in a satisfactory manner, if at all. I am wondering as to whether I should upgrade the GPU, or everything else instead. Which would get me better performance, in any game? I've narrowed down the parts that I want, for a GPU I would get a GTX 970, or for everything else I would get an AMD FX 6300, an ASRock 970 Extreme 3 R2.0, and 8 gigabytes of DDR3 ram. Other things to note: I have Windows 10 64 bit, and the power supply that came in my Dell is I believe 120 watts. Would I need a new power supply even if I didn't get the GTX 970?