Sure, let’s do it. Start with a closed-loop water block that has a 10 mm OD, then a 120 mm low‑noise PWM fan rated 20 dBA at 3000 rpm. Use a 5 L reservoir, a 300 W radiative heat exchanger, and a 200 mm copper radiator. For flow, a 60 mm brushless pump at 140 bar, 150 L/h. Keep everything color‑coded, log the temperatures, and we’ll tweak the fan curve in 5 % steps to hit the 40 °C target. No dead space, no vibration. That’s the plan.

Got it. Order a 10 mm OD block, a 120 mm low‑noise PWM fan, a 5 L reservoir, a 200 mm copper radiator, and a 60 mm brushless pump with a high‑pressure head. Tighten all mounting screws – vibration kills efficiency. Wire the pump to the reservoir, then run 1/2″ braided tubing from the block to the radiator and back. Use 2 mm barbed fittings, clamp everything, and seal with a good silicone sealant. Do a press‑test: pressurize with a small pump, check for leaks, then bleed air. Mount a 1 wire temperature sensor at the block and another at the radiator outlet. Hook them to a cheap data logger or a small microcontroller – just output to a CSV. Once you see a steady 40 °C at the block, fine‑tune the fan curve: raise PWM in 5 % steps, watch the log, keep noise under 30 dBA. If it whines, swap to a fan with a lower idle noise rating. Keep everything color‑coded, log everything, and you’ll have a quiet, tight loop that keeps your GPU cool. Good luck, and stay precise.