A PC enthusiast has developed a split liquid cooling system that utilizes outdoor air to regulate internal temperatures. The setup includes a 240mm external radiator equipped with two Noctua iPPC-3000 fans, which activates automatically based on real-time environmental data.
The system is managed by an Arduino Mega controller running a Python script. It monitors coolant temperature, ambient air, and humidity via six sensors. A motorized three-way valve directs flow to the external radiator, ensuring the coolant remains at least 5 °C to 10 °C above the dew point to prevent condensation.
The internal hardware features a delidded Core Ultra 7 270K Plus with a Thermal Grizzly Mycro Pro direct-die block, an RTX 4070 Ti Super with a Bykski block, and 48GB of DDR5-8400 RAM cooled by Bykski heat spreaders. An EK Kinetic D5 pump-reservoir handles the internal loop.
To prevent freezing in sub-zero conditions, the coolant mixture was modified with pure ethylene glycol, lowering its freezing point to -28 °C. Under heavy load, the CPU maintains temperatures between 45 °C and 52 °C, while the GPU operates at 37 °C to 48 °C.
