Using Corsair H80i w/Q-Fan and AI Suite III

[VanGoghComplex]

So, I'm using a Corsair H80i to cool my Intel i7 4790K. Since there's only one CPU_OPT header on the Maximus VII Hero, and I don't like using "Y" splitters on PWM fans, I'm only using a single radiator fan as opposed to the stock push-pull arrangement. Not a problem; I'm not overclocked.

I'm curious as to the difference between the CPU_FAN and CPU_OPT headers. The Corsair H80i has a pump cable, which is a single tach signal back to the mobo for the sole purpose of alerting the user to a pump failure. The fan is a regular 120mm fan on a PWM connection.

I have the pump plugged into the CPU_FAN header, because I'm assuming that's the only one that alarms if it falls below a certain threshold. My question is: can I plug the pump tach signal into the CPU_OPT header, and still get a "CPU FAN ERROR!" on boot if the pump squirts its last? I ask because the CPU_OPT header does not show up in the BIOS or in AI Suite III as a controllable fan. I can't set it to a curve. I know it reads the CPU_OPT header separately, because it has its own unique RPM value as viewed through AI Suite III, but I can't control it.

TL;DR: Does the CPU_OPT fan header stop the boot sequence if it detects a zero tach reading?

[Florin]

I totally ignored the pump`s sensor and i don`t have it plugged to anything, i`m using push pull with my 2 fans while using CPU_FAN and CPU_OPT on a Silent curve ... Works just fine ... if the pump will fail you`ll get a temperature warning anyway.

Corsair`s software is the most buggy thing i have ever encountered in my life, about nothing works and to get the pump seen on USB is just pure luck.