Originally Posted by Hambone07si
Can't see why your having so much trouble. It was 1 2 3 for me and everything was good. We have the same blocks on the h80 and h100. You and I have the same Sabertooth. Here is a pic of load temps on the 3930k at stock everything. It runs at 3.5ghz with 1.164v load and my temps are as shown is this badly taken pic.
Also, the rpm sense wire should be hooked up to the cpu fan header. It doesn't just read rpms, mine kicks the fans up BIG TIME when it start to heat up. If your fans aren't ramping up during load, then something is wrong. My h80 stays nice and quiet until full load, then it sounds like the pc mite lift off my desk.
Read up on how fans work - the yellow wire is an output from the fan and an input to the motherboard: http://pcbheaven.com/wikipages/How_PC_Fans_Work/
The single black wire to the 3 pin header goes to the same pin of the 3 pin header that yellow wires go to.
If you doubt me read from the Corsair blog
on installing the H100 where it says:
"The H100 is powered by the 4-pin peripheral cable, while the 3-pin fan header sends pump RPM information to your motherboards BIOS."
The fans speed up and slow down based on coolant temperatures measured by the H100 and on the fan speed setting selected on the H100. Any motherboard settings are irrelevant.
This is assuming you plug your fans into the H100, if you're plugging them into the motherboard, then yes the motherboard will affect their rpm.
FYI push vs pull won't make that much difference as you found out. Push wins over 1800rpm, but it's not explain this big a deal of difference.
I don't get any pump noise, I can feel a bit of vibration on the pipes.