the click is from the motherboard "c1" code- when the LED's turn on.

corsair hx 1000w
920 d0
6gb gskill 2000mhz rated

have tried all differnt safe combinations of voltages.

basically the problem occurs simply because the bclk is high- even if I turn down the cpu multiplier and ram divider to underclocking, but keep bclock moderately high, and have generous safe voltages for everything it still occurs.

the lower the bclock the fewer "fail" clicks from the mobo. but yeh - the main issue is sometimes it will turn on for about 5 seconds then off(all fans pwoered down) then boot from backup bios with warning/error

I note that the green overvolt LED for the ?northbridge (the one nearest the PCI slot) is always lit even in "failsafe values" mode, and the machine will not post from cold boot if IOH >1.18

its giving me a great deal of stress because just when I think its happy it fails to boot, despite being prime stable for 24 hrs +