I have a hp p6674y with the amd phenom 2 820 quad core processor. 14 gb crucial memory. I upgraded the memory to this. I got a amd phenom 2x4 960t processor,black edition for a cpu change,and amd black edition fan . when I changed it out and powered it up it would not power up. it would start then kick its self off??? what could be the problem here?? im not computer person. this is my first change. I read the specs and thought this cpu would work. Did I miss something. Any advice would be greatly appericated