Hmmh. Im confused. I printed out the RamQVL file and double checked the content. And it still looks like that my KHX1600c9d3k2/8gx IS listed there. I pulled my sticks from machine and that exact code was printed on them too. I'm not suspecting you telling me they are not compatible and will buy a new set if needed. Just curious.
qvl list downloaded from this side ASUSTeK Computer Inc. -Support- Memory/Device Support (P8Z68-V LX) P8Z68-V LX
Also I tried to turn on my comp this morning with same results but after I took out one ram stick and went bios. Ram settings in bios were set to 1333mhz 1.5v and timings were 9-9-9-24. So I changed them to what they should be. (1600mhz 1,65v with 9-9-9-27) So now my computer can load into normal mode but only with 1 stick installed.
I'm really starting to think this problem has something to do with my cpu memory controller not letting me run more than 1 stick at time.