I guess I just don't know when to quit. Anyway, I played around with it some more, it seems what's making it be completely dead on power-on is related to memory frequency. I have 2400MHz memory but when I bump it higher than 1866 it won't start.
Do I need to adjust some voltages or something? CPU voltage or memory voltage?
I read the guide that mkenyon posted, but since I have a specific problem (too high memory frequency causes computer not to boot), I'd like to understand specifically what affects this, as solving problems one by one is better than just changing every number all at once. I did try setting all the numbers as the guide suggested, but it didn't seem to help. My Motherboard apparently has a set of Debug LEDs on it which might help diagnose the problem, but my manual doesn't list what the codes mean and I can't find it online.
On another subject, people earlier suggested to disable sleep mode. I don't even seen an option for this in my BIOS. The APM (Advanced Power Management) menu only has options for when to WAKE the system. I can do it in Windows by having Windows set to not put my computer to sleep after being idle, but this seems like a subpar solution, because some else using my computer could accidentally hit Sleep from within Windows start menu. Is there a bios setting to disable sleep mode?
I found something onlien that suggested you don't need to actually disable sleep, but instead disable "PLL Overvoltage". My BIOS doesn't ahve that option, but it does have the option to change PLL voltage directly. It defaults to Auto (no clue what that means), would entering a value manually here be the same as disabling "PLL Overvoltage"?
Yea, sorry, I got caught up in researching something on my car and then went to bed. I 'think' I found another guide you to at least view. It's best to read it over first, to get at least a basic idea of what they are doing, then try to change things.
Haz has mentioned all the basic solutions to the problems you're having. Such as sleep being related to C states. Usually under a section in the bios related to CPU advanced power settings. Most boards show C1E, C3, C6, and 'Package C State Support'. All with enable/disable as options.
As for your RAM, the package or the RAM sticks themselves should have the voltage they use and the some numbers generally listed like X/X/X/X (commonly 9/9/9/24). Or you can look up the specs online and see them listed the same way. On the motherboard this usually shows up in DRAM Configuration. You definitely want the voltage to be correct, instead of just using auto, since this is overclocked RAM. Voltage and the 4 other settings will probably determine whether or not you reach the 2400mhz.
Thread below is for your board, but I don't have an ASUS account to download the images or PDF where someone made a guide for it:
http://rog.asus.com/forum/showthread.php?9247-BIOS-Screensots-of-Stable-4.6-Overclock-P9X79-Pro
The guide for ASRock boards, which I have, does a decent job of breaking down what some of the settings mean, which may be of help. I'd give it a read through.
http://www.overclock.net/t/1198504/...-guide-sandy-bridge-ivy-bridge-asrock-edition
For starters, I would default all your changes in BIOS, make sure it runs, then make changes to your RAM voltage and DRAM settings to the specifications that your RAM states. If you can't get 2400 with those all correct, just go down to the 1866, but try to get all the settings spot on first.