JunPus

JunPus JP-DX1

Expert rating6.5 / 10

Material:: Nanodiamond and silicone
Thermal Conductivity:: 16 W/mK
Electrical Conductivity:: Non-Conductive
Recommended Use:: High-end CPU/GPU

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: JunPus Last updated: 2026-10-06

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JunPus JP-DX1 Review

JunPus JP-DX1 is JunPus's original nano-diamond thermal grease, rated 16 W/mK maximum.

JP-DX1 is a very thick nano-diamond grease with a big headline number. JunPus rates it at 16 W/mK "max" with a thermal resistance of 0.05 C-cm2/W at 60 psi, and lists a viscosity of 3,000,000 mPa s, which is stiff. That figure comes from JunPus itself. It is built from nanodiamond powder and silicone, grey, and rated non-corrosive and non-flammable. We'd use it for CPU repastes by someone comfortable with stiff pastes. If you want easier handling at a similar rating, ID-Cooling Frost X45 is the friendlier pick.

Thermal Performance and Conductivity

JunPus rates JP-DX1 at "16 MAX" W/mK and a thermal resistance of 0.05 C-cm2/W at 60 psi. The word "max" tells you it is a best-case figure, and no test method is named.

On paper it sits just under its sibling JP-DX2 (17 W/mK max) and above Thermalright TF7 (12.8 W/mK). Treat the spread between these as marketing until independent tests say otherwise.

Compound Type and Composition

JunPus lists the main components as nanodiamond powder and silicone. Specific gravity is 2.7 g/cm3, and the paste is grey. JunPus describes it as oxidation resistant, non-corrosive, non-volatile and non-flammable, and RoHS compliant.

Application and Consistency

JunPus lists the viscosity at 3,000,000 mPa s, or 3,000 Pa s. That is a very stiff paste: it won't run, but it takes a firm spread or a well-centered dot under high mounting pressure to thin out. JunPus sells it in 1g, 20g, 30g and 50g packs, plus a dispensing format for production lines.

Electrical Safety

Retailer listings describe JP-DX1 as non-conductive, and diamond is an electrical insulator. JunPus's product page doesn't list a resistivity figure, so we'd still keep squeeze-out off exposed GPU components.

Longevity and Pump-Out Resistance

JunPus says JP-DX1 "retains stability over time and supports long-term storage". It publishes no operating temperature range, reapplication interval or pump-out data. A paste this stiff should resist pump-out on a CPU heatspreader, but we have no test confirming it.

Comparison to Alternatives

Against JunPus JP-DX2 (17 W/mK max), DX1 is the older sibling with the same handling challenge. Against ID-Cooling Frost X45 (15.2 W/mK) and Thermalright TF7 (12.8 W/mK), both are easier to apply and better documented on temperature range. Against IC Diamond 7 Carat, JP-DX1 is another diamond-filled option.

We'd pick Frost X45 for most buyers and JP-DX1 for those who want the diamond filler specifically.

Our verdict

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

Expert rating6.5 / 10

JunPus's original nano-diamond overclocking grease, also sold in bulk for system builders, with the same limited independent review coverage as its successor.

Best for

Experienced builders who want a diamond-filled paste
CPU repastes with high mounting pressure
Bulk buyers, given the 20g to 50g packs

Not for

First-time builders who want an easy spread
Buyers who need a published operating temperature range
Delidded direct-die extreme cooling

Specifications

What these specs mean

Identity and form

Brand	JunPus
Model	JP-DX1
Material Class	Nanodiamond powder and silicone compound

Thermal performance

Conductivity Source	https://www.thermal-paste.com/products/nano-diamond-thermal-paste/jp-dx1.html

Electrical and board risk

Paste Segment	Standard Paste

Application

Viscosity	Viscosity 3,000,000 mPa.s (3,000 Pa-s), per JunPus; very stiff grey grease

Quantity, volume versus weight

Density	2.7 g/cm3

Thermal Conductivity	16 W/mK max
Electrical Conductivity	Insulating
Package Size	1g, 20g, 30g or 50g
Recommended Use	High-end CPU/GPU

FAQs

Is JP-DX1 or JP-DX2 better?

JunPus rates JP-DX2 slightly higher at 17 W/mK max versus 16 W/mK max for JP-DX1. Both are stiff nano-diamond greases; the difference on paper is small.

Is JunPus JP-DX1 hard to apply?

Yes. JunPus lists a viscosity of 3,000,000 mPa s, which is very stiff. Use a firm spread or a centered dot and rely on high mounting pressure.

Is JP-DX1 electrically conductive?

Retailer listings describe it as non-conductive. JunPus's page doesn't publish a resistivity figure, so clean any squeeze-out off exposed components.

What is JP-DX1 made of?

JunPus lists nanodiamond powder and silicone as the main components.

What sizes does JP-DX1 come in?

JunPus lists 1g, 20g, 30g and 50g packs, plus a dispensing format for production use.