Hi all, It looks like I've discover yet another feature of the uguru, a bit in the fan bank which seemed to be sometimes 1 sometimes 0 actually seems to indicate whether a fan is present or not. I'm not 100% sure, but I'm starting to see a pattern and sofar it holds in 100% of the cases I have. I'll buy myself an extra 3 wire fan and put it on the aux fan connectors then I'll know for sure soon enough. Which brings me to the question, do we want to export this to userspace (I guess we do) and if we do how. May I suggest a readonly boolean fan[1-x]_present? Regards, Hans