|I don't know what you do that would require 28GB RAM but your current memory configuration is less than optimal. By not installing matched pairs, the system drops out of dual channel mode. You're losing 50% of the potential memory bandwidth by running single channel mode. Plus the best RAM for an FX-series CPU is DDR3-1866.|
"The mother Board is a H8-1414"
No, that's the model number of your computer. You have an HP ENVY h8-1414 desktop: http://h20564.www2.hp.com/hpsc/doc/...
The motherboard is an M3970AM-HP (Angelica2): http://support.hp.com/us-en/documen...
Since you have an AMD motherboard, you MUST use an AMD CPU & it must be compatible with the board. Of the CPUs you listed, the only one compatible with your board is the AMD FX-8350. Personally, I think you'd be wasting your money. If you want to run an Intel CPU, you will have to replace the board, which means Windows will have to be reinstalled from scratch. Not only that, but if you upgraded to Win10 from the original HP Windows installation, you will NOT be able to reinstall Windows using the HP product key because the key it tied to the original HP board.
The power supply is arguably the most important hardware component in a PC because everything depends on it. The fact that you replaced it with "something I don't remember" doesn't give a warm fuzzy feeling about your choice. PSUs get discussed in these forums a lot. A decent quality unit should be 80 plus certified, a single large (120mm or 140mm) cooling fan, a single +12v rail of 30A or more, active PFC, enough plugs & the correct type(s), 3-5 warranty, reputable manufacturer. Wattage? It's not the most important thing to look for. If all the other requirements are covered, the wattage will take care of itself. Minimum 400W, depending on your hardware configuration.
I suggest you do a LOT of reading before pulling the rigger on any hardware purchases. I have a feeling you're on the wrong track & just want to upgrade for the sake of upgrading, rather than upgrading wisely for peak performance.