Original grid controller was a real disappointment control wise. You could´t control fans individually and couldn´t use both CPU and GPU temps for control. The concept was good, features were terrible. I was looking at its homepage and it still seems to be very limited. Even if it now has independent channel control, it still doesn´t seem to allow to switch off fans which is a completely bummer for semi-passive enthusiasts. like me. And it also have a limited temperature scan for a software based device. No HD? No VRM? I'm not even asking for a wired probe. Anyway, I'll still keep using my MB with splitters and a digital thermostat with customization hysteresis bought from DX from 5 usd. Adjusting case fan curvers is the less importante feature for a fully optimized semi-passive build: Switching off fans and temperature scans by probes and different components is the most important.