Water 3.0 Ultimate low RPM pump

[BCfromVA]

Hello,

 

I just purchased a 3.0 Ultimate to replace my CM Glacer 240L, which had a pump failure. My motherboard is the ASUS Rampage V Extreme. The pump is plugged into CPU_FAN, and the fans are plugged into Chassis Fan 1A. Both Speedfan and Fan Xpert are reporting the max RPMs for the pump to be ~1850 RPMs, however the spec clearly shows 3600 +- 150. 

 

Any idea why it's so low?

 

 

[TT CPM]

Hi BCfromVA

it's about BIOS setting, the max pump rpm is actually the 1850rpm x 2