I'm having an issue with the cpu northbridge.
Before the windows 10 creators update i had both hypertransport and nortbridge clocked at 2400mhz at stock voltage 1.2375v (CPU NB Voltage), with cpu oc to 4.4ghz 1.4125v and it was stable. When windows updated, the pc when booting was having some strange graphical glitches, the first thing i did was clearing cmos and the gliches disappeared. Back then i didn't overclock and raise the HT and NB frequency. Recently i started to overclock again, this time with a lower cpu clock for temps, at 4ghz 1.275v and raised HT to 2400mhz and it's stable. Then as i raised the NB even at 2200mhz with stock voltage or 1.35v, the glitches occurred again (if i raise the base clock it boots at ~2100mhz). I am waiting for the fall creators update to do a clean install of windows, maybe it could solve the problem?
Asrock 970 Extreme4
FX 4130
4GB RAM
GT 640