Are you aware if there is a specific sgminer build for nvidia, and is it only used for neoscrypt or all algorithms?
All versions of CG/SG miner were designed with AMD in mind. In fact, as StuffOfInterest pointed out, CGminer doesn't even work with NVIDIA GPUs at all. Fortunately, I believe someone is working on a ccMiner for NeoScrypt, and there is also a version being developed purely for the new generation of Maxwell GPUs (GTX 900-series) which does include info like what you're looking for (fans, temps, etc.). There is also a supplemental app, called SplitScreen, which works with existing versions of ccMiner and includes all that extra info, but sadly it isn't compatible with MinerControl.