Alphacool

Alphacool Apex 2 Thermal Paste

Expert rating6.7 / 10

View on Alphacool Shop (EU)View on shop.alphacool.com

Thermal Conductivity:: 6.7 W/mK
Electrical Conductivity:: Non-Conductive
Recommended Use:: High-end CPU/GPU
Package Size:: 2g syringe

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Manufacturer: Alphacool Last updated: 2026-10-08

Where to buy

Alphacool Shop (EU)Go to store

Alphacool Apex 2 Thermal Paste Review

The Alphacool Apex 2 is a 2026 thermal paste from Alphacool, the successor to the original Apex compound, developed jointly with TIM manufacturer Halnziye for CPUs and GPUs including overclocked and hotspot-heavy chips.

Alphacool officially rates the Apex 2 at 6.7 W/mK with a measured thermal resistance of just 0.0006 C-in2/W, and the compound is electrically non-conductive so it's safe around exposed pins and VRM components. Alphacool markets it specifically for high-end CPUs and GPUs, overclocking rigs, workstations, and servers, citing lower GPU hotspot temperatures in their own comparison testing against the original Apex. The gray paste has a fairly thick, high-viscosity consistency (130-140 Pa·s) rated for a -20 to 130C working range and loses only 0.1% of its mass after 96 hours at 100C, suggesting decent pump-out resistance. Against Alphacool's own Subzero also in this catalog, the Apex 2 is the newer, workstation/overclocking-oriented formula while Subzero remains positioned for sub-ambient extreme cooling specifically.

Thermal Performance and Conductivity

Alphacool officially rates the Apex 2 at 6.7 W/mK with a measured thermal resistance of 0.0006 C-in2/W, a mid-tier figure typical of a general-purpose high-performance paste rather than a liquid-metal or diamond-based compound.

Composition

Alphacool has not published the exact base material for the reformulated Apex 2, only that it was developed jointly with TIM manufacturer Halnziye and that the recipe was rebuilt from scratch rather than iterated from the original Apex.

Application and Consistency

The paste ships in a 2g syringe with a thick, high-viscosity consistency (130-140 Pa·s at 20C) that fills microscopic surface irregularities between the IHS and cooler base.

Electrical Safety

The Apex 2 is electrically non-conductive, so accidental contact with surrounding motherboard components or exposed pins carries no short-circuit risk.

Longevity and Pump-Out Resistance

Alphacool's own accelerated-aging figure shows only 0.1% mass loss after 96 hours at 100C, and the paste is rated for a -20 to 130C working range.

Comparison to Alternatives

Against Alphacool Subzero also in this catalog, the Apex 2 is the newer overclocking/workstation-focused formula, while Subzero remains explicitly positioned for sub-ambient extreme cooling.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating6.7 / 10

A high-end Alphacool paste with a solid published conductivity figure, though independent review coverage is thinner than bigger paste-specialist brands.

Best for

High-end CPU and GPU builds, overclocking rigs, workstations and servers wanting Alphacool's current-generation paste
Builders who want a documented low weight-loss figure for long-term stability

Not for

Buyers who specifically want liquid-metal-level conductivity
Anyone needing a confirmed silicone/carbon base disclosure, which Alphacool has not published for this formula

Specifications

What these specs mean

Identity and form

Brand	Alphacool
Model	Alphacool Apex 2

Thermal performance

Conductivity Source	https://shop.alphacool.com/en/detail/index/sArticle/22025

Electrical and board risk

Paste Segment	Standard Paste

Application

Viscosity	130 Pa-s

Cure and durability

Pump-Out Resistance	High

Operating envelope

Min Operating Temperature	-20 C
Max Operating Temperature	130 C

Quantity, volume versus weight

Density	2.6 g/cm3

Thermal Conductivity	6.7 W/mK
Electrical Conductivity	Insulating
Package Size	2g syringe
Recommended Use	High-end CPU/GPU (developed with Halnziye for CPUs, GPU hotspots, overclocking systems, workstations and servers)
Safety Notes	Causes serious eye irritation; toxic to aquatic life with long-lasting effects. Wear protective gloves and eye protection and wash hands thoroughly after use.

FAQs

What are the key specifications of the Alphacool Apex 2 Thermal Paste (Non-Conductive/6.7 W/mK/High-end CPU/GPU)?

Key specs for the Alphacool Apex 2 Thermal Paste: Thermal Conductivity 6.7 W/mK, Thermal Conductivity Source https://shop.alphacool.com/en/detail/index/sArticle/22025, Electrical Conductivity Insulating, Operating Temperature -20 to +130 °C, Density 2.6 g/cm3, Safety Notes Causes serious eye irritation; toxic to aquatic life with long-lasting effects. Wear protective gloves and eye protection and wash hands thoroughly after use..

Will the Alphacool Apex 2 Thermal Paste (Non-Conductive/6.7 W/mK/High-end CPU/GPU) work with my current setup?

The Alphacool Apex 2 Thermal Paste (Non-Conductive/6.7 W/mK/High-end CPU/GPU) lists Thermal Conductivity is 6.7 W/mK. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Alphacool Apex 2 Thermal Paste (Non-Conductive/6.7 W/mK/High-end CPU/GPU) best suited to?

Best suited to: High-end CPU and GPU builds, overclocking rigs, workstations and servers wanting Alphacool's current-generation paste; Builders who want a documented low weight-loss figure for long-term stability.

What are the drawbacks of the Alphacool Apex 2 Thermal Paste (Non-Conductive/6.7 W/mK/High-end CPU/GPU)?

Not the best fit for: Buyers who specifically want liquid-metal-level conductivity; Anyone needing a confirmed silicone/carbon base disclosure, which Alphacool has not published for this formula.