Applying too little (or too much) thermal paste can leave your CPU or GPU running hotter than it should, throttling performance right when you need it most under heavy gaming or rendering loads. With dozens of formulas on the market claiming the best conductivity and longevity, it’s hard to know which paste actually delivers on those promises versus which ones are just marketing hype.

This guide breaks down the top thermal pastes available right now, what separates a great compound from an average one, and answers to the most common questions buyers have before their next repaste or build.

As an Amazon Associate we earn from qualifying purchases.

How to Choose a Thermal Paste

  • Thermal Conductivity: Look for a rating of at least 5-8 W/mK for demanding gaming or overclocked systems; higher numbers generally mean better heat transfer away from the die.
  • Electrical Conductivity: Non-conductive, non-capacitive formulas are safer for beginners since accidental spillage onto the motherboard won’t cause a short.
  • Viscosity and Application: Thicker pastes spread less easily but often last longer, while thinner pastes are easier to apply evenly but may need reapplication sooner.
  • Included Accessories: A bundled spatula or application tool makes spreading paste evenly much easier, especially for first-time builders.
  • Longevity: If you don’t plan on repasting often, choose a compound rated for multiple years of durability so performance doesn’t degrade prematurely.

The Best Thermal Pastes Reviewed

ARCTIC MX-4 (4 g)

The ARCTIC MX-4 is a long-trusted favorite for good reason: it’s non-conductive, easy to spread, and holds up for years without needing a reapplication, making it an excellent all-around choice for CPUs and GPUs alike.

ARCTIC MX-4 (incl. Spatula, 4 g)

This version offers the same reliable MX-4 formula with the added convenience of a spatula, which helps first-time builders achieve a clean, even layer without guesswork.

ARCTIC MX-6 (8 g)

The ARCTIC MX-6 steps up thermal conductivity noticeably over the MX-4 while remaining non-conductive, and its larger 8g size makes it a smart pick for anyone maintaining multiple systems, consoles, or laptops.

ARCTIC MX-7 (8 g)

Built for long-term durability, the ARCTIC MX-7 is designed to maintain peak performance over extended use, making it ideal for gamers who want to set it and forget it for years at a time.

Thermal Grizzly Kryonaut

A favorite among serious overclockers, Thermal Grizzly Kryonaut delivers extremely high performance under demanding thermal loads, making it a top choice for pushing CPUs, GPUs, and consoles like the PS5 or Xbox to their limits.

Frequently Asked Questions

How often should I replace thermal paste?

Most quality pastes last two to five years, but if you notice rising idle or load temperatures, it’s a good sign the paste has dried out and needs replacing.

How much thermal paste should I apply?

A small pea-sized dot in the center of the CPU is usually enough, since the pressure from the cooler will spread it evenly across the die without needing to manually smear a large amount.

Is non-conductive thermal paste necessary?

It’s not strictly required, but non-conductive formulas are much safer for beginners since they won’t cause a short circuit if a small amount accidentally spills onto surrounding components.

Does more expensive thermal paste really perform better?

Generally yes, higher-end pastes like Thermal Grizzly Kryonaut offer measurably better thermal conductivity for overclocking, but budget options like standard ARCTIC MX-4 are still more than sufficient for typical gaming builds.

Final Thoughts

For most gamers, the ARCTIC MX-4 remains the best all-around value, while those chasing every last degree of cooling for an overclocked build should reach for Thermal Grizzly Kryonaut, and anyone maintaining several devices will appreciate the larger capacity of the ARCTIC MX-6.