i've just buy a AsRock P67 Fatal1ty Professional, a 2600K and 2x4gb DDR3 Geil Black Dragon 1600mhz
after some tests, i've figured out that my 2 stick of ram works fine ONLY in slot 1 & 2... if i insert a stick in slot 3 or 4 i can't even reach the BIOS, it only show a black screen, and no beep sounds from the motherboard...
i can't use dual channel with ram installed in slot 1 & 2, i must use slot 1 and 3, or slot 2 and 4...
all BIOS setting to default. ram @ 1333mhz.
it's the motherboard broken?
if the ram is not compatible, why the system boot up properly when installed in slot 1 & 2?
your mobo support Supports 1333 and 1600. check in Cpu-Z and slots 1 and 2 it means Black (2) and red (1), ... right ? in this case you only use a single channel of ram. and RAm may not be suitable for this type of motherboard, if you have other Ram kit from supportlist Ascrock site you can try.
they talk about a short circuit caused by the backplate of the cpu cooler. on my Asrock i've mounted a Thermalright Ultra Extreme, with its backplate, and never try to run the system with Intel stock cooler. the problem may be here
if it is short-circuiting the pc will not live, this just problems RAM compatibility support, because when mounted 1 and 2 PC will live and if the 1 and 3 do not live, hmmm .. try to test your Ram with memtest 86 + only test one by one .. just make sure if it's really clean, it means the motherboard just like the RAM is supported by the vendor list
and if you do not overclock no test on Prime95, enough with the game all day if it does not matter that means a normal.
But if still the problem is better you ask the vendor to support
I am having this same issue. I have G.SKILL 2133 RAM - all four 4GB DIMMs have been tested to be error free in a single slot, but when i have a single dual-channel configuration (either A1/B1 or A2/B2) I get error code 45. When all four slots are populated, I get a boot but with massive memory errors/random BSODs. I am going to try re-seating my CPU to ensure that it is making full contact with the socket and place some type of stoppers in between my CPU cooler's rear mounting bracket per your suggestion and see if that works. This problem does not seem to be solely indicative of bad RAM, a bad board, or a bad CPU (very unlikely) and seems to be geared more toward poor installation.