something was fine for people who have no control but still want their flow, a DFM of the GMR is directly connected to the motherboard: GMR FlowMeter AFSTL Aquatuning - Der Wasserkhlung Vollsortimenter - Durchflusssensor GMR Transparent G1/2 AG Highflow - inkl. Elektronik, LED und 3Pin Stecker Durchflusssensor GMR Transparent G1/2 AG Highflow - inkl. Elektronik, LED und 3Pin Stecker 71190 and since I do not like the original reducer, I have found the Aquatuning - Der Wasserkhlung Vollsortimenter - Reduziermuffe G1/2 auf G1/4 IG - gerndelt - black nickel Reduziermuffe G1/2 auf G1/4 IG - gerndelt - black nickel 64125 Video: YouTube - Kanal von cartago2202