I would start by lowering the highest frequency you use by say -25mV then test for stability. Once stable then lower by another -25mV and test again. Once stable/satisfied, lower the rest of the frequencies by the same mV.
Hit thanks if I helped
Note 3 (0x1'd): Echoe v13 KK + SneakyKat 2.6b @ 2.8ghz
Nexus 7 32gb: CM11 nightly + Lego's F2FS @ 1.3ghz
HTC One X Quad [v1]: CM11 Stable @ 1.3ghz
SE Arc: cm10.1 + Fusion v5.5 Kernel @ 1.4ghz/1250mv
Tab 2 10.1:cm10.1 @ 1.4ghz/384mhz
Old Stuff: SE k850i, k800i, k750i, Nokia 3310