If you had the 6 pin adapter your psu couln't handle the card, I think it requires at least 500 watts and yours is 360 watts
These beasts require a lot of power and you second image shows us you pc not your cpu (cpu is under the large fan)
I have two ideas.
1.) Sell the card and stick with the default card.
2.) Buy a psu running at least 600w with the 6 aux pin adapter.
I suggest the first option as these pcs are meant to work with the default hardware. If you really require a graphics card try a low profile card as there more economical and a better size.