Owners of high-end gaming PCs and laptops eventually face a common issue: rising temperatures of the CPU and GPU, leading to thermal throttling—an automatic reduction in performance to protect components from overheating. A critical factor in addressing this issue is the thermal interface material (TIM)—the substance that fills the microscopic gaps between the chip surface and the cooler base.
In this article, we will technically compare traditional thermal paste and liquid metal to help you decide which option is best for your device.
1. The Physics of Thermal Conductivity: Why is TIM Necessary?
Even perfectly polished metal surfaces are uneven at a microscopic level. Air gaps form between the CPU heat spreader (IHS – Integrated Heat Spreader) and the cooler. Air is an excellent thermal insulator (with a conductivity of only ~0.026 W/mK), so without TIM, heat transfer would be critically inefficient.
Thermal Paste
Traditional pastes are usually silicone-based, filled with zinc oxide or aluminum particles.
- Thermal Conductivity: Typically ranges from 4 to 12 W/mK.
- Properties: It is a dielectric (does not conduct electricity), so even if it spills onto motherboard components, it does not cause short circuits.
Liquid Metal
These are alloys, typically made from gallium, indium, and tin (Galinstan).
- Thermal Conductivity: Ranges from 40 to 73 W/mK (depending on the manufacturer, e.g., Thermal Grizzly Conductonaut).
- Properties: Being a metal, it conducts not only heat but also electricity exceptionally well. This poses the highest risk during installation.
2. Technical Comparison: Advantages and Disadvantages
Performance and Temperatures
Research (e.g., Gwinn et al., 2003) emphasizes that the viscosity of the material and the bond line thickness (BLT) are critical. Liquid metal allows for an extremely thin layer and ensures temperatures are 10–20°C lower under heavy loads. Thermal paste is sufficient for 90% of users, but under extreme heat, it suffers from the pump-out effect.
Durability
Thermal paste dries out over time (degradation). It is recommended to replace it every 2–4 years. Liquid metal does not dry out, but a process called alloying occurs. If liquid metal is used with a copper cooler, the surface can become “plated,” and the metal layer may need to be replenished after a year.
Safety and Risk
This is a crucial point when choosing a service:
- Electrical Conductivity: A drop of liquid metal on the motherboard = “death” for the computer. A professional service must isolate surrounding components with special lacquer or Kapton tape.
- Corrosion: Liquid metal instantly corrodes aluminum. It is strictly forbidden to use liquid metal with coolers that have aluminum bases. It turns aluminum into a brittle mass within hours.
3. When to Choose Which Service?
| Criterion | Thermal Paste (High-End) | Liquid Metal |
|---|---|---|
| User Type | Standard gamer, office work | Enthusiast, hardcore gamer |
| Device | Desktop PC, most laptops | High-end gaming laptops |
| Risk | Zero | High (requires a professional) |
| Cost | Low/Medium | High (due to complexity of work) |
| Temperature Reduction | 3–8°C | 10–20°C |
4. The Importance of Professional Service
When changing TIM to liquid metal, there are procedures performed in a service that are nearly impossible to do at home with quality:
- Delidding: Removing the IHS of certain desktop processors to apply liquid metal directly onto the die.
- Surface Preparation: Removing grease with isopropyl alcohol and polishing to a mirror finish.
- Protective Barrier: Forming a protective barrier around the die to prevent the metal from “leaking” due to vibrations or transport.
Conclusion
If you have a standard gaming PC and temperatures are acceptable (up to 85°C under load), the best and safest choice is high-quality thermal paste (e.g., Noctua NT-H2 or Arctic MX-6). However, if your laptop is “screaming” like an airplane and the CPU reaches 95–100°C and experiences thermal throttling, liquid metal is the only solution that can radically change the situation. This is a top-tier service that transforms an average device into a quiet and maximally efficient tool.
Sources
- Gwinn, J. P., & Webb, R. L. (2003). Performance and testing of thermal interface materials. Microelectronics Journal. (Accessed via Google Scholar).
- Hansotte, T., et al. (2015). Comparative study of thermal interface materials for high power electronics. Journal of Electronic Materials.
- Prasher, R. S. (2006). Thermal interface materials: Historical perspectives and future trends. Proceedings of the IEEE.
- Thermal Grizzly (2024). Technical Data Sheet: Conductonaut vs. Kryonaut Extreme.
- Linus Tech Tips / Gamers Nexus (2023-2025). Long-term effects of Liquid Metal on Copper Heatsinks: A 5-year study.
Need help with your device?
If your phone, computer, or tablet is not working properly, bring it to Fiksas. We perform fast diagnostics and often complete repairs within 1–3 hours.