Hmm the cpu just needed a bigger step in voltages as i expected.
Running at 2.55GHz now with 1.3V/1.25V 2.56GHz failed priming even with 1.35V/1.3V after ~3hrs. Starts to make me curious why it fails after 3hrs most of the time.
Removed the cooler and added my cpu's stepping to my sig.
Bookmarks