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 syringe with black cap and white labelling, 4 g thermal paste

ARCTIC COOLING

ARCTIC COOLING ACTCP00031B MX-4 thermal paste 4 g

SKU CH-2CHP-RV0DE MPN ACTCP00031B

Carbon-microparticle thermal paste for CPU and GPU, non-conductive and safe for beginners, 4 g syringe with spatula included

  • Carbon microparticles deliver extremely high thermal conductivity for efficient CPU and GPU heat dissipation
  • Metal-free and non-electrically conductive formula eliminates short-circuit risk and corrosion concerns
  • Consistent texture allows easy application even for beginners without air pockets
  • Authenticity verification available for every unit to confirm genuine product
  • Formula unchanged across packaging revisions for proven long-term quality

Proven thermal compound for CPU and GPU

ARCTIC MX-4 uses carbon microparticles to fill microscopic surface gaps on processors and cooler bases, delivering high thermal conductivity for efficient heat transfer. The formula has remained unchanged across packaging revisions, so the performance you get today matches the long-standing reference. The 4 g syringe includes a spatula for controlled spreading.

Metal-free paste with resealable syringe

Being non-electrically conductive eliminates the risk of short circuits if excess compound bridges nearby components, and it avoids the corrosion concerns associated with liquid-metal alternatives. The consistency is designed for easy application even for first-time builders, and the syringe can be resealed between uses to keep the compound fresh.

Verify authenticity and sizing before ordering

Each unit carries an authenticity code you can check on the manufacturer’s site to confirm you received genuine MX-4. The product line spans sizes from 2 g to 45 g, so confirm the 4 g quantity matches the number of applications you plan. No specific CPU socket, GPU model or cooler mounting hardware is required for compatibility.

How it compares

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

Price $5.99
Cheaper than about 90% 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

Size & build
Shipping weight0.01 kg
Package size117 × 24 × 15 mm

Questions about this item

Does the carbon-microparticle formula in this 4 g MX-4 tube set a practical limit on thermal conductivity?

The carbon microparticles fill microscopic surface cavities to deliver very high thermal conductivity, so heat moves from the CPU or GPU to the cooler quickly and efficiently.

What does the package include so the paste can be spread evenly on a CPU or GPU die?

The box contains a 4 g syringe and a spatula, giving you the tool needed to apply a thin, even layer on any processor or graphics chip.

What is the correct way to apply MX-4 so no air pockets remain between the die and cooler?

Dispense a small drop onto the centre of the chip, then use the included spatula to spread it into a uniform film before mounting the cooler.

More in Thermal Paste

Similar items