Well, as someone that uses an Asus PA279 i've got no idea where your coming from on that statement ? Ok, not £800 but does me very nicely thanks.
As it happens, i use said screen with a C6H............................the C6H has had no issues with power delivery in all the time i've had it. Maybe you should just learn to clock properly, not leave things on AUTO and take control yourself ? After all, that is what clocking is about.................isn't it ?
I had.... 3 Asus branded PSU's (for my PG278Q) before getting tired of replacing them and sorted out a delta PSU with fractionally more amps/watts but the same voltage/pin. No issues since.
I getting annoyed now.
I bought the 8 pack ram to solve my instability issues and it's made things worse.
You can see my thread here.
I'm thinking of just selling up and getting a 8700k myself.
How'd you find the prime board otherwise? Saw a couple of comments here (about vdroop/similar) that have me a little worried.