Originally Posted by derfer
Well I fixed my issue and confirmed the cause at the same time. I unlocked my cards, applied a higher overclock, and removed my custom fan profile. Both cards now run the same speed with no throttling due to the higher temps.
You bring up a issue I had that didn't know cause . My MSI 660ti PE/OC out of box would run 1202 . I didn't like temps reaching 70c so I used AB to keep them in check (set profile so mid 50c , approx 50% max at load).
I found with that setting now I only got to 1189 , so had to set +13 to get back stock default . I have since raised so it reaches 1228 mhz . So investigating a bit . disable fan profile got me 1241 in heven, and I noticed it only went to higher clock after it got warmed up a bit .
It seems once I hit 60c then it ran full clocks , so seems 60c-70c is whats needed to get full speed , at least for me .
PS: with heven=extreme setting I got a error display driver not responding or something in tray , heven screen went black for sec ,OS didn't crash . this was at 1241 . I lowered back to 1228 and happened again .
Once this happens to have to reboot to reset driver properly of is ver4.0 heven extreme that much harder than 3.0 . I have ran 3.0 at 1255 w/o issues .