Phobya HeGrease Extreme
- Thermal Conductivity:
- 8.5 W/mK
- Electrical Conductivity:
- Non-Conductive
- Recommended Use:
- High-end CPU/GPU
- Package Size:
- 3.5g syringe
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Manufacturer: Phobya Last updated: 2026-09-15
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Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU) Review
The Phobya HeGrease Extreme is Phobya's high-performance thermal compound, rated 8.5 W/mK and sold as the step-up from HeGrease Standard for high-end CPU, GPU, and chipset cooling.
Phobya officially rates HeGrease Extreme at 8.5 W/mK, noticeably higher than HeGrease Standard's 6 W/mK, and the compound carries a much higher density at 3.73 g/cm3, consistent with heavier thermally-conductive filler content. It remains electrically non-conductive and ships in the same 3.5g syringe format as Standard, with a similarly thick, high-viscosity consistency (around 85,000 cps). Against Phobya's own NanoGrease Extreme also in this catalog, HeGrease Extreme sits below it on officially-rated conductivity (8.5 vs 16 W/mK), positioning HeGrease Extreme as the mid-tier option within Phobya's own three-paste lineup rather than the flagship.
Thermal Performance and Conductivity
Phobya officially rates HeGrease Extreme at 8.5 W/mK, above its own HeGrease Standard (6 W/mK) but below NanoGrease Extreme (16 W/mK), both also from Phobya.
Composition
Phobya markets HeGrease Extreme as its high-performance-sector compound; the higher measured density (3.73 g/cm3) versus HeGrease Standard (2.5 g/cm3) points to a heavier thermally-conductive filler load, though the exact base chemistry is not published.
Application and Consistency
The paste ships in a 3.5g syringe with a thick, high-viscosity consistency of approximately 85,000 cps, matching the handling feel of HeGrease Standard.
Electrical Safety
HeGrease Extreme is electrically non-conductive, carrying no short-circuit risk from typical application.
Longevity and Pump-Out Resistance
Phobya does not publish a specific reapplication interval for HeGrease Extreme; its high viscosity and density are generally associated with good pump-out resistance.
Comparison to Sibling Products
Against Phobya's own NanoGrease Extreme also in this catalog, HeGrease Extreme sits in the middle of Phobya's three-paste lineup on officially-rated conductivity (8.5 W/mK, versus 6 W/mK for HeGrease Standard and 16 W/mK for NanoGrease Extreme).
Specifications
Identity and form
| Brand | Phobya |
|---|---|
| Model | Phobya HeGrease Extreme |
Application
| Viscosity | 85000 Pa-s |
|---|
Quantity, volume versus weight
| Density | 3.73 g/cm3 |
|---|
| Thermal Conductivity | 8.5 W/mK |
|---|---|
| Electrical Conductivity | Insulating |
| Package Size | 3.5g syringe |
| Recommended Use | High-end CPU/GPU and chipset cooling, marketed by Phobya as its high-performance-sector compound |
| Paste Segment | Standard Paste |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- High-end CPU, GPU, and chipset cooling wanting a step up from Phobya's entry HeGrease Standard
- Buyers who want to stay within Phobya's own product family at a mid-tier price point
Not for
- Buyers chasing Phobya's highest officially-rated conductivity, which belongs to NanoGrease Extreme in this catalog
- Anyone needing a larger syringe for multiple full-size applications
FAQs
What are the key specifications of the Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU)?
The Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU) is a thermal paste from Phobya. Key specs: Form Paste, Thermal Conductivity 8.5, Electrical Conductivity Non-Conductive, Recommended Use High-end CPU/GPU and chipset cooling, marketed by Phobya as its high-performance-sector compound, Package Size 3.5g syringe.
Will the Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU) work with my current setup?
The Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU) lists Thermal Conductivity is 8.5. 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 Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU) best suited to?
It suits high-end cpu, gpu, and chipset cooling wanting a step up from phobya's entry hegrease standard, buyers who want to stay within phobya's own product family at a mid-tier price point.
What are the drawbacks of the Phobya HeGrease Extreme (Non-Conductive/8.5 W/mK/High-end CPU/GPU)?
It is a poor fit for buyers chasing phobya's highest officially-rated conductivity, which belongs to nanogrease extreme in this catalog, anyone needing a larger syringe for multiple full-size applications.
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