I think this is a pretty well documented condition - try searching under "Abnormal" lol. You might try going into AI Suite / Probe II and unchecking anyhting that you don't want to receieve a low voltage notification for. Likely you are entering a power saving mode.. and going below thresholds. It could also be that you have multiple software monitors running and could be inducing some thread management issues to the sensors. Try disabling other monitoring software if you are going to use AI Suite or just disable the notifications in AI Suite - but pick one.
Regarding your OC.. you might try dropping half your ram.. keep slots 2/4 populated (red) with (2x4gb) and then set them to DOCP 1600 - though shouldn't be an issue with your FX. I was watching an intro ROG video on OC'ing recently and I like how they set the voltage high then bump up the clocks until it becomes unstable.. much easier than always being in the bottom of the envelope.
Some guidelines from guru3d:
http://www.guru3d.com/articles_pages/amd_fx_8150_processor_review,8.htmlSome generic overclocking guidelines in the BIOS:
•Disable Turbo mode
•Disable APM Master
•Disable thermal states
•Set CPU voltage anywhere from 1.4V to 1.55V (make sure you have enough cooling!)
•Set DDR memory voltage 0.10V higher for increased stability. E.g. 1.55V would be 1.65V
•Increase the base multiplier
From the above guru3d got a 200x23 on 1.45v.
It is also generally much easier if you follow the power management settings from Raja's Overclocking guide in this forum (sticky). CPU and NB LLC on High, etc. read it.
CPU:AMD FX-8350 BE @ 4800Mhz C5F 1803
Clocks: FSB: 200x24 NB:2400Mhz HT:2400 Mem:2133Mhz
Voltage: CPU:1.50 NB:1.20 HT:1.20 Mem:1.65
Memory: 8GB Gskill DDR3-2133 (F3-17000CL9D-8GBSR)
Storage: sysvol: 2x256GB Transcend SSD RAID0 (amd_sata) Game: 128GB SSD Data: 2TB SATA
GPU: EVGA GTX 680 SC+ SIG 2GB 1254/3105