Additional observation:
1. Reboot computer
2. Launch HWiNFO - (can audibly hear fans get louder) CLC Fan 1500RPM steady
3. Close HWiNFO, launch EVGA FlowControl - (can audibly hear fans get quieter) CLC Fan 1200RPM steady
4. Close EVGA FLowControl, launch HWiNFO - CLC Fan 650-720RPM fluctuating...