It may boot to 4.6 GHz @ 1.4v but in my experience you need a bit more voltage than that to stay stable. Try going to 1.45v CPU core and see if that improves stability.
Also, make sure your CPU NB has a small voltage bump. In particular, boosting CPU core voltage but ignoring the CPU NB voltage will not work. The FX 8350 usually needs the extra CPU NB voltage brought up to 1.25-1.30v or so.
If you are pushing the motherboard NB and HT, you also want to give them around 0.025-0.050v more, capping around 1.15v NB and 1.25v HT.
Make SMALL changes and test. Keep temps and voltages in the safe range.