Hi, Thanks for reply. I understand. Resistance can come from tight bends, restrictive waterblocks etc I guess. I am using 12mm ID hose with a Thermochill PA 120.3 dual row dual pass. Anyway, from what I read on some forums, people were getting very good results with this pump especially on restrictive loads. They also mentioned using the pump together with Aqueros.

According to the information at Kustom PC, the lift head on this pump is 4.2 metres. Is this correct? I have read on some forums that when powered only via 4 pin and without the USB, the pump will be running at 50hz. Yet the maximum speed is 100hz? Also I read that people are not able to set maximum speed of 100hz? Can you confirm the lift height of the pump shown in the link? http://www.kustompcs.co.uk/acatalog/info_7903.html Is 4.2m correct and what speed is the pump at for 4.2m head?