● Covered by 1 source · 1 reportLow impact1 neutral
Modder Adapts 4-kW Air Conditioner Radiator for PC Cooling Benchmarks
Key points
- A 4-kW AC radiator was converted for PC water cooling.
- RTX 5060 temperature dropped from 52ºC to 33ºC.
- RTX 3080 temperature dropped from 65ºC to 28ºC.
- Overclocking GPUs showed only a 3% FPS increase.
Custom Cooling System Assembly
A hardware examiner, TrashBench, modified a 4-kW outdoor radiator-fan unit from a split air-conditioning system for PC cooling. The process involved removing unnecessary internal components, adding casters for mobility, and integrating a standard reservoir into the unit. Custom 3D-printed mounting brackets were designed for the cold plates to connect to PC components.
RTX 5060 Cooling Performance
The modified cooling system was first tested with an RTX 5060 GPU. Its temperature dropped from 52ºC with a standard cooler to 33ºC, a 16ºC reduction. Despite this significant temperature drop, overclocking the GPU from 2902 MHz to 3300 MHz (a 14% clock speed increase) resulted in only a 3% average FPS uplift. This suggests that Nvidia's power/performance curve is well-optimized since the RTX 2000 series.
RTX 3080 and CPU Cooling Results
Next, an RTX 3080, a more power-hungry GPU, was tested. Its temperature decreased from 65ºC to 28ºC. Similar to the RTX 5060, overclocking the RTX 3080 also yielded only a 3% FPS improvement. The system was then challenged with a combined GPU and CPU load, using an Intel Core i9 14900K processor, known for its high heat output.
Implications for Overclocking
The experiment demonstrated the extreme cooling capabilities of a repurposed 4-kW air conditioner radiator. While it achieved very low operating temperatures for both GPUs, the minimal performance gains from overclocking indicate that modern GPUs are already operating near their optimal power-to-performance efficiency. This suggests that simply lowering temperatures beyond a certain point may not translate to substantial real-world gaming performance improvements.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
A hardware modder repurposed a 4-kW outdoor air conditioner radiator unit into a PC water-cooling system to test its performance with an RTX 5060, RTX 3080, and Intel Core i9 14900K. The custom setup significantly reduced GPU temperatures, but overclocking yielded minimal FPS gains, demonstrating current GPU power/performance curves.