So from a better look at your BIOS I have one suggestion you should try. I would start by backing off your OC to something like stock voltage and 3.7-3.8ghz for preliminary testing.
One thing I notice that has been a common cause of instability for some people is that your HT clock speed is significantly higher than the CPU/NB clock speed. This was a common setting on the earliest bulldozer chips and was later revised as a poor practice on later models due to frequently (but not always) being a source of instability.
Before doing any testing Download HWINFO64 as it is the best for monitoring FX voltage and temps in my experince. You will also want to temporarily disable Cool and Quiet mode. Both that and C1E can be renabled for powersaving once you have a stable OC if you care to.
I would start by lowering your HT clock to 2200mhz to match your CPU/NB...you should be able to easily get this setting stable with say a 3.8ghz OC and your Ram at defualt timings and 1600mhz speed. This will not be a final set up but a good place to start. Starting at stock voltage run a 10-15min stress test on the CPU. Use HWINFO64 to monitor the minimum voltage you see as well as the average and max during the test. Then try using one of the other LLC settings and repeat until you have gone through all the possible LLC options.
Find the LLC option with the lowest Voltage droop during load, keep a perticular eye on max voltage when you go from idle to full load and back again as LLC can sometimes overvolt and that is why testing it on an already OCed system can be disaster if you are close to your limits.
Once you have your LLC figured out up the clocks to 4.0ghz and do your testing again monitoring voltages and temps. If you see dips and failures up the voltage one click at a time until you find a stable setup.
Repeat for 4.2ghz, and again for 4.4ghz, and maybe one more time for 4.6ghz. Make sure with each step you are recording your results somehwhere as well as all your settings.
If you manage to get a better OC with the HT and CPU/NB clocked the same speed, and want to squeeze a little more out of your system; start with uping the CPU/NB to 2400mhz and retest, you may need to add voltage to it using the NB offset. Do not mess with the other voltages for now but if it doesnt work up the offset a few clicks and try again. Mine runs at 2600mhz and needs 1.40v to do so. I can run 2400 at 1.20v so a small bump in speed can require a lot of volts on some boards.
FYI the CPU/NB is on the CPU die and has its own voltage control. Increasing its speed or volts will increase your CPU temps. It will also improve your memory controller and L3 cache speeds which are sometimes a bottleneck on FX chips.
The regular NB is refrencesing the NB chipset which is usually under a heatsink on your motherboard. You do not generally add voltage to this as it can overheat quickly and rarely improves stability. The naming can be confusing however so it is worth pointing out.
If you get 2400mhz CPU/NB stable up your HT to match and repeat. I would go as far as 2600 on both if you can manage it, but you should not need more than stock voltage on the HT and the HT should always be equal or lower than the CPU/NB speed for best stability.
Good luck. If you wanna chat about any of your settings or my methodology hit me up with a PM and I will get you in discord sometime. Edited by gapottberg - 11/10/17 at 5:37pm