Modern gaming consoles, such as the PlayStation 5 (PS5) or Xbox Series X, have power levels comparable to high-end personal computers. However, this power generates a massive amount of heat that must be effectively dissipated from the system on a chip (SoC). After several years of intensive use, the cooling system can lose its efficiency, leading users to experience loud fan noise and, in extreme cases, hardware failures. In this article, we will analyze the degradation of thermal interface materials (TIM) and the importance of their replacement.
1. What Happens Under the Hood: The Role of Thermal Paste and Liquid Metal
The surface of the processor and the heatsink may appear smooth to the naked eye, but at a microscopic level, they are full of imperfections and air gaps. Air is a poor conductor of heat, which is why thermal paste or liquid metal is used between these two surfaces.
- Devices using thermal paste (PS4, Xbox One, Xbox Series X/S): Traditional thermal paste consists of silicone oil and thermally conductive particles (silver, ceramic, or carbon). Its purpose is to fill microscopic imperfections and ensure thermal conductivity.
- Liquid metal (PS5): Sony took a bold step with the PS5 by using liquid metal (an alloy of gallium, indium, and tin) instead of paste. Its thermal conductivity is incomparably higher than that of standard paste, but it is electrically conductive, requiring special sealing solutions to prevent leakage onto the motherboard.
2. Why Does the Console Start to Whine Loudly?
The sound often described by users as a „jet engine” is a direct response of the cooling system to poor heat transfer.
Dry-out Effect of Thermal Paste
Over the years, due to constant heat (cyclical heating and cooling), the silicone oil in the thermal paste evaporates. This process is known as the pump-out effect—where, due to microscopic component expansion, the paste is simply „pushed” from the center to the edges. Dried-out paste becomes hard, brittle, and loses its ability to fill air gaps.
Chain Reaction:
- Impedance rise: Thermal resistance between the processor and heatsink increases.
- Sensor feedback: Thermal sensors detect rising temperatures.
- PWM adjustment: The operating system increases fan RPM to compensate for poor heat transfer through airflow. Since the heat does not reach the radiator, the fan spins at maximum speed, creating significant noise.
- Thermal throttling: If the fan is no longer effective, the processor artificially reduces its clock speeds, causing games to start „stuttering”.
3. PS5 and Liquid Metal Issues: Oxidation and Displacement
Although liquid metal does not dry out like paste, it has other specific issues. If the console is left standing vertically for a long time, due to gravity and changes in surface tension forces, the liquid metal can shift, leaving „dry spots” on the processor.
Additionally, oxidation occurs—liquid metal reacts with the surface of the heatsink (usually nickel-plated copper). The resulting oxide layer increases thermal resistance. Scientific studies (e.g., Zhang et al., 2021) emphasize that the longevity of liquid metal depends on the airtightness provided by the foam gasket around the processor.
4. When Is It Time to Replace the Thermal Interface?
Most manufacturers recommend preventive cleaning every year, but replacing the thermal interface becomes necessary when:
- The console shuts down with a message: „Your PS5 is too hot”.
- The fan noise disrupts the game sound even under moderate load.
- You notice a significant drop in frames per second (FPS) after 15–30 minutes of gaming.
Important warning about PS5: Replacing liquid metal requires extreme care. The smallest drop on the motherboard can cause a short circuit.
Benefits of Preventive Maintenance
- Quieter fan operation: Reduced noise levels.
- More stable FPS: Avoids throttling.
- Longer lifespan: Protects the SoC chip from overheating.
Recommended Materials
For Xbox and older PS models, switching to high-quality thermal paste (e.g., Thermal Grizzly Kryonaut or Arctic MX-6) can reduce temperatures by 10–15 degrees.
| Console Type | Used TIM | Main Degradation Risk | Recommended Solution |
|---|---|---|---|
| PS4 / Xbox One / Series X | Traditional paste | Drying out, pump-out effect | Replace with high-quality paste every 3–4 years. |
| PlayStation 5 | Liquid metal | Oxidation, leakage (dry spots) | Professional review/distribution. |
Conclusion
Investing in new thermal paste or a liquid metal review after 3–4 years of use is the cheapest way to protect the console from expensive processor failure (SoC failure). The „jet engine” sound is not just an acoustic inconvenience—it is a cry for help, warning of an internal system overheating crisis.
Sources and Literature
- Zhang, Q., et al. (2021). Thermal reliability and aging mechanism of liquid metal thermal interface materials. International Journal of Heat and Mass Transfer.
- Prasher, R. S. (2006). Thermal Interface Materials: Historical Perspective, Status, and Future Directions. Proceedings of the IEEE.
- Vasan, A. S., et al. (2021). Impact of Thermal Interface Material Degradation on the Reliability of Consumer Electronics.
- Sony Interactive Entertainment (2020). PlayStation 5 Teardown: Liquid Metal Cooling Explained.
- Digital Foundry (2023). PS5 and Xbox Series X: Long-term performance and cooling efficiency tests.
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