We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Grey thermal paste in an 8g syringe with resealable cap

ARCTIC COOLING

ARCTIC COOLING MX-4 AC-MX4 thermal paste 8g

SKU CH-YV7J-EB4TF

Carbon-based thermal compound with 8.5 W/mK conductivity fills microscopic gaps between CPU or GPU and cooler, is non-conductive and non-corrosive, and comes in an 8 g syringe

  • DetailsThermal Conductivity (W/mk): 8.5Viscosity (poise): 870Densit
  • Key featuresNon-Capacitive, Non-Electricity-Conductive, Carbon-Micro par

Weight 8g

Model Standard

  • Exceptional heat transfer backed by 8.5 W/mK conductivity
  • Safe for all components with non-conductive carbon formula
  • No degradation over time unlike metal or silicone pastes
  • Easy application for beginners thanks to 870 poise viscosity
  • Convenient 8g syringe with resealable cap for multiple uses

Premium carbon thermal compound 8g

ARCTIC MX-4 is a carbon microparticle-based thermal paste supplied in an 8g syringe. It provides a thermal conductivity of 8.5 W/mK and a viscosity of 870 poise for reliable heat transfer between processors and coolers. The non-conductive, non-capacitive formula eliminates the risk of electrical shorts on surrounding components. Its non-curing, non-bleeding consistency ensures long-term stability without degradation.

Ideal for CPU GPU and console cooling

This paste suits builders upgrading desktop CPUs, laptop processors, graphics cards or game consoles who need a safe, easy-to-apply compound. The syringe design and resealable cap allow precise dispensing and storage for future maintenance. It is not intended for users requiring the absolute maximum conductivity offered by liquid metal alloys. Buyers who prefer a pre-applied pad or a smaller single-use portion should consider alternative formats.

8.5 W/mK thermal conductivity rating

The 8.5 W/mK conductivity figure is the primary metric determining whether this compound meets your thermal budget. Higher values indicate better heat flow across the microscopic gaps between die and heatsink. With a density of 2.5 g/cm3 and 870 poise viscosity, the material spreads thinly under mounting pressure without pumping out over time. Verify that this conductivity level matches the cooling requirements of your specific hardware configuration.

How it compares

Measured against everything we stock in Thermal Paste, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 75% of the 498 comparable items (median $12.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameARCTIC COOLING
Product lineArctic Cooling MX-4
Model nameAC-MX4

Other versions of this model

5 more in the same range

Questions about this item

What does the 8.5 W/mK conductivity figure mean once the paste is inside my PC?

The 8.5 W/mK rating shows how well the carbon microparticle compound fills microscopic gaps between the CPU or GPU die and the cooler base, allowing heat to move quickly into the heatsink.

The product is described as non-conductive and non-capacitive — what does that cap in practice?

Because the paste does not conduct electricity or store charge, accidental contact with pins, traces or component leads will not cause short circuits or signal interference.

What does the 8 g syringe need to fit or mount during application?

The syringe dispenses directly onto the processor surface; no mounting hardware is required — just spread a thin layer before seating the cooler.

More in Thermal Paste

Similar items