H100 pump fan speed will not change

[gst94]

My H100 pump fan speed always stays at around 2000 RPM, no matter the cpu temperature (idle 35C, prime bench 70+ C). Also the pump light always stays at the same level once it is being set by push button, regardless of cpu temperature.

I used the Asrock utility in Windows to check the H100 pump fan speed through MB chasis fan pin.

Is this normal?

[RAM GUY]

Yes the Pump should always stay at MAX RPM!

[gst94]

But isn't the pump fan speed has three levels:

Fan Speed (+/- 10%): up to 1300 RPM (Low Noise), 2000 RPM (Balanced), and 2500 RPM (High Performance).

(source: amazon.com http://www.amazon.com/Corsair-Cwch10...4242822&sr=8-6)

And the max speed should be 2500 RPM?

[RAM GUY]

No the pump always runs at 100% the FANS are what will change with the level you set.

[mistermister]

Right. Given how silent the H100's pump is when operating at 100%, having a variable speed option would be pointless. Plus it would probably add to the cost of the unit.