Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste
Expert rating7.8 / 10
- Material:
- Gallium Alloy (Liquid Metal)
- Electrical Conductivity:
- Conductive
- Recommended Use:
- High-end CPU/GPU
- Package Size:
- 1g syringe
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Manufacturer: Alphacool Last updated: 2026-10-08
Where to buy
- Alphacool Shop (EU)Go to store
Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste Review
The Alphacool Eisfrost Xtreme is Alphacool's liquid-metal thermal compound, a gallium-based alloy sold as a high-performance alternative to silicone or ceramic thermal pastes for overclocked CPUs and GPUs.
Alphacool doesn't publish a single W/mK figure for the Eisfrost Xtreme, but liquid metal alloys of this type conduct heat many times faster than conventional greases, which is the entire point of the product. It's electrically conductive, so unlike every other paste in this catalog it carries a real short-circuit risk if it touches motherboard components, RAM, or a GPU's surrounding PCB, and Alphacool is explicit that it must only be used on copper, gold, silver, lead, zinc, or nickel-plated copper: applying it to a bare aluminum cooler will corrode the metal. The compound ships with two cotton swabs and a cleaning wipe since a proper liquid-metal application needs careful spreading rather than a simple X or dot pattern. Against Phobya NanoGrease Extreme and Alphacool's own Subzero, both non-conductive ceramic/silicone pastes elsewhere in this catalog, the Eisfrost Xtreme trades that safety margin for the higher raw conductivity liquid metal is known for, making it a fit for experienced overclockers on copper-based coolers rather than a first thermal-paste purchase.
Thermal Performance and Conductivity
Alphacool has not published a W/mK figure for the Eisfrost Xtreme; as a gallium-based liquid metal it relies on metallic conduction rather than the ceramic or silicone fillers used in conventional pastes, which is why liquid metals generally outperform greases on raw heat transfer.
Composition
The Eisfrost Xtreme is a gallium alloy liquid metal with a specific gravity of 6.44 g/cm3 at 20C and a melting point of -19.3C, meaning it stays liquid at all normal handling and operating temperatures.
Application and Consistency
Despite a low measured rotational viscosity of 6 mPa·s, the alloy's high surface tension makes it handle like a thick, slow-spreading liquid; Alphacool includes two cotton swabs and a cleaning wipe specifically for controlled application.
Electrical Safety
Unlike every non-conductive paste in this catalog, the Eisfrost Xtreme is electrically conductive and must never contact exposed motherboard or GPU components, and it is compatible only with copper, gold, silver, lead, zinc or nickel-plated copper surfaces, not bare aluminum.
Longevity and Pump-Out Resistance
Alphacool does not publish a reapplication interval for the Eisfrost Xtreme; liquid metal compounds generally resist pump-out far better than paste, though some alloys can migrate or amalgamate with copper over years of use.
Comparison to Alternatives
Against Phobya NanoGrease Extreme and Alphacool's own Subzero, both non-conductive pastes elsewhere in this catalog, the Eisfrost Xtreme trades that electrical safety margin for the higher raw conductivity liquid metal offers, and requires copper-based (not aluminum) cooler contact surfaces.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7.8 / 10
A gallium-alloy liquid metal aimed at high-end builds, bundled with application swabs to ease the learning curve.
Best for
- Experienced overclockers with copper or nickel-plated-copper cooler bases wanting maximum conductivity
- Delidded, direct-die CPU/GPU setups where liquid metal is the established choice
Not for
- Aluminum coolers or any aluminum contact surface, which liquid metal will corrode
- First-time thermal paste users, or anyone uncomfortable with a compound that can short-circuit exposed electronics
Specifications
What these specs meanIdentity and form
| Brand | Alphacool |
|---|---|
| Model | Alphacool Eisfrost Xtreme |
| Material Class | Gallium Alloy |
Electrical and board risk
| Paste Segment | Liquid Metal |
|---|
Application
| Viscosity | 6 Pa-s |
|---|---|
| Applicator Included | None |
Quantity, volume versus weight
| Density | 6.44 g/cm3 |
|---|
| Electrical Conductivity | Conductive |
|---|---|
| Package Size | 1g syringe, includes 2 cotton application swabs and a cleaning wipe |
| Recommended Use | High-end CPU/GPU, including overclocking; also suited to Delidded-Direct-Die use per manufacturer application guidance |
| Safety Notes | Electrically conductive liquid metal; must never contact exposed electronic components or it can cause a short circuit. Compatible only with copper, gold, silver, lead, zinc, or nickel-plated copper surfaces; will corrode and damage bare aluminum and must never be applied to aluminum coolers. Causes skin irritation; wash affected skin thoroughly with water. |
FAQs
What are the key specifications of the Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste (Gallium Alloy/Conductive/High-end CPU/GPU)?
Key specs for the Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste: Electrical Conductivity Conductive, Material Gallium Alloy, Consistency High surface tension, handles like a thick liquid metal despite a low measured viscosity (6 mPa·s, rotational viscometer, 20-110C); spreads slowly and must be worked in with the supplied swabs, Density 6.44 g/cm3, Operating Temperature Melting point -19.3°C; liquid at all normal operating and room temperatures, Safety Notes Electrically conductive liquid metal; must never contact exposed electronic components or it can cause a short circuit. Compatible only with copper, gold, silver, lead, zinc, or nickel-plated copper surfaces; will corrode and damage bare aluminum and must never be applied to aluminum coolers. Causes skin irritation; wash affected skin thoroughly with water..
Who is the Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste (Gallium Alloy/Conductive/High-end CPU/GPU) best suited to?
Best suited to: Experienced overclockers with copper or nickel-plated-copper cooler bases wanting maximum conductivity; Delidded, direct-die CPU/GPU setups where liquid metal is the established choice.
What are the drawbacks of the Alphacool Eisfrost Xtreme Liquid Metal Thermal Paste (Gallium Alloy/Conductive/High-end CPU/GPU)?
Not the best fit for: Aluminum coolers or any aluminum contact surface, which liquid metal will corrode; First-time thermal paste users, or anyone uncomfortable with a compound that can short-circuit exposed electronics.
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