Man 2100rpm is low, I have the same card and run it around 3000-3300rpm (1652mhz/1050mv P7) in more demanding games like BF5 and BlackOps4. I ended up replacing the TiM with Thermal Grizzly Kyronaut and also replaced the VRM pad with Thermal Grizzly minus Pad 8 3mm and that has dropped temps a lot.
Speed is the same with Automatic (my memory straps) on CNv8 with TRM. Power consumption seems 5-10W lower. Running on 3x 580 4GB, 1x570 4GB. Fan curve seems to disable the Zero RPM fans... Hopefully it gets fixed.