The default CPU/HT should be 2400 if I'm not mistaken, and upping the CPU vcore, the memory voltage, and the VDDR voltage may help you get some stability out of it. Set things to manual, and it will show you "exactly" what the CPU, mem, HT, VDDR, etc, voltage are, and give you access to them in small increments.
On your mem timings, go to tools and check the SPD values for the mem, and set it to that. If you still have a problem with it, up the voltage that the memory is recommended by the manufacturerand not what's in the bios. You may even need to go a tad higher for stability. I did
I'm plagued with OCing problems because I'm running 32Gb's of (4x8GB) G.Skill Trident X 2400Mhz mem, which hampers OCing just because the power needed to run all four DIMM's while trying to reach the 5Ghz mark as others do with the 8350.
Like you, I just want a stable boost/overclock that enhances performance a bit. For instance, just installed Windows 8.1, and to do so, I backed down from 4.8Ghz to 4.7, and since the install has a glitch. I may just set it to stock/default 4Ghz values for a fresh install, and see what happens. Windows 8-8.1, so far (in my humble opinion) sucks harder than a Hoover on steroids.
In any case, I'd try setting things to "manual", and slowly adjusting voltage and CPU speeds. There are lots of folks running the same CPU/mobo here in the forums who's setting you can use as a reference.
One other thing. I never use the FSB to overclock with, as it effects my memory settings, and speed. I use the multiplier instead so that my memory can remain at factory specs, and I can control it's stability better by using "factory voltage's" instead of what the bios will most likely show you.
Set your T rate to 2T for memory too. Look at "Tools" in the bios, and go by the settings it has there, which will be the factory SPD's for your mem. You may have to scroll to the right to find the settings for your max memory Ghz settins/timings, but no matter what, set the DRAM Command rate to 2T. Don't leave it on auto, or it could be setting it by default to 1T, causing your machine to be unstable in a bad way.
As I said, there are some serious Asus/AMD guru's here in the forums who can help you with your settings. Some of these guys work for Asus, and can tell you "exactly" what to do, and what not to do.
I'd take what they had to say about it seriously, but, also remember, no two machines are going to run the same, even with identical parts, and settings.
Best of luck to you. (Y)
Crosshair V Formula-Z/AMD FX-8350 Black Vishera @ 4.6Ghz/G.SKILL Trident X Series 16GB (2X8GB)-2400Mhz/Twin SAPPHIRE Radeon R9 270X 4GB 256-Bit GDDR5 @ 1100-1450 clocks/Twin Crucial M550 128Gb SSD's-1 WD Se WD 1TB 128MB Cache-3.5" Enterprise Hard Drive/CORSAIR Hydro Series H100i Extreme Water Cooling-push/pull 4 X 120mmFans/RAIDMAX RX-1000AE SLI Certified 80 PLUS GOLD-Modular PSU/2 X ASUS Blu-ray Burners/Asus LED VE278H/Cooler Master HAF 932 Advanced W-Fan Mods
