I want to put my hard drive into another Pc and use it to boot

So have any idea what I can do

can you give the make and model of the motherboard?

Yeah... I don't really know. It's in a case and I don't know how to tell what motherboard it has
I can See GIGABYTE which I am assuming is a brand as I have graphics cards with that name

Ga-965p-ds3p

yep manual shows an 8 pin connection Gigabyte GA-965P-DS3P | Manual

EDIT: in your post 15 i see one of the back blocking cover is laying on a board. hope you did not turn it on with that on their still.

I did with the 4 pin connected and the cover on
then I took off the cover and put in the 8 pin and now it wont turn

was talking about this. i put a black box around it. hard to see

oh yeah. shart yeah I did. Is that bad

could be could of shorted the board take that off and try again