UD3H, not D3H. That aside the p8z77-v is one of the better boards.I suggest you try a Gigabyte GA-Z77X-D3H.
I think everything else is OK, unless your PSU is giving you issues, but I doubt it.
THe UD3H is much better board than the D3H. Only get a D3H if your really short on money.GA-Z77X-D3H is a board http://www.novatech.co.uk/products/components/motherboards/intel1155z77chipset/ga-z77x-d3h.html it's cheaper than the UD3H http://www.novatech.co.uk/products/components/motherboards/intel1155z77chipset/ga-z77x-ud3h.html
Unless you were suggesting he gets the UD3H instead?
Chances are that the issue is not the board if RMAing the board still has this many issues.I am kind of surprised he's got issues two boards going, so yeah test it with an amp meter, didn't think of that earlier.
OK, sounds like a plan. Yeah if you were getting BSODs it was probably down to your RAM.
Ah sorry for saying it could be so many things. Computers eh, what can ya do?
Please, Don't be sorry. You've more of less responded to every question I have instantly all day today. I'm really thankfull. If you were charging, I'd be selling my blood by now