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White syringe with grey cap labelled ARCTIC MX-4 45g thermal paste

ARCTIC COOLING

ARCTIC COOLING MX-4 ACTCP00024A thermal paste 45g 8.5 W/mK

SKU CH-HJ0N-8H9EE MPN ACTCP00024A

Carbon-based thermal paste with 8.5 W/mK conductivity in a 45 g syringe for CPU and GPU heat transfer

  • Net content45g
  • Thermal conductivity8.5 W/mK
  • DetailsThermal Conductivity: 8.5 W/(mK) Viscosity: 870 poise Densit
  • Key featuresAMAZON #1 BESTSELLER: The MX-4 convinces everyone with its u

Weight 45 g

  • High thermal conductivity of 8.5 W/mK for efficient heat transfer
  • Carbon micro-particle composition fills microscopic gaps on CPU and GPU surfaces
  • Easy application consistency suits beginners and experienced builders alike
  • 45 g syringe with resealable cap allows multiple uses over time
  • Electrically non-conductive formula eliminates risk of short circuits

ARCTIC MX-4 45g Carbon Thermal Paste

The ARCTIC MX-4 is a carbon-based thermal compound designed to fill microscopic gaps between a processor and heatsink. With a thermal conductivity of 8.5 W/mK, it transfers heat efficiently for CPUs and GPUs in desktops, laptops and game consoles. The 45g syringe includes a resealable cap for multiple applications over time.

Upgrade from basic silicone or stock paste

Builders replacing generic silicone grease or dried-out factory compound will see lower temperatures under load. The carbon micro-particle formula eliminates the curing time required by some metal-based pastes. The jump is worth it when thermal limits throttle performance or when fan noise becomes excessive during sustained workloads.

Simple syringe application for beginners

The 870 poise viscosity allows smooth spreading without running, making it easy to apply a pea-sized dot or thin line. Common mistakes include using too much paste, which can spill onto the socket, or leaving air pockets by lifting the cooler after seating. The resealable cap prevents the compound from drying out between uses.

How it compares

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

Price $27.99
Pricier than about 84% of the 498 comparable items (median $12.99).

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Specifications

Product
Brand nameARCTIC COOLING
Product lineMX-4
Model nameACTCP00024A
Performance
Thermal conductivity8.5 W/mK
Size & build
Net content45g
Shipping weight1.36 kg
Package size198 × 38 × 25 mm

Other versions of this model

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Questions about this item

What size syringe and weight does the 45g MX-4 paste come in?

The product is supplied as a 45 gram syringe with a resealable cap for storage between uses.

How do I apply the carbon-based MX-4 paste without trapping air bubbles?

Dispense a small amount onto the centre of the CPU heatspreader, then mount the cooler straight down; the 870 poise viscosity spreads evenly under pressure without manual spreading.

How often should the MX-4 thermal compound be replaced on a CPU or GPU?

The carbon micro-particle formula is non-drying and rated for at least eight years, so replacement is only needed if the cooler is removed or temperatures rise unexpectedly.

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