This article covers ARCTIC MX-4 (20g).

Overview

The ARCTIC MX-4 is a staple thermal paste in the PC building community, offering a reliable and affordable solution for CPU and GPU cooling. This 20-gram syringe provides enough material for multiple applications, making it a cost-effective choice for enthusiasts and system builders. Based on carbon microparticles, the MX-4 delivers a thermal conductivity of 8.5 W/mK while being completely non-conductive and non-capacitive, eliminating the risk of short circuits if accidental spillage occurs. Designed for long-term stability, this paste maintains its performance for years, requiring no reapplication between CPU upgrades. It is compatible with all CPU socket types, including Intel LGA1700/1200/115x and AMD AM5/AM4/sTR5/sTRX4, as well as GPU dies. The MX-4 sits in the entry-level to mid-range market segment, but its proven reliability and balanced performance have earned it a reputation as a go-to product for both beginners and seasoned builders.

Compatibility Guide

The MX-4 is universally compatible with any CPU cooler and socket. It works with Intel LGA1700, LGA1200, LGA115x, and AMD AM5, AM4, sTR5, sTRX4, and all other standard sockets. It can also be applied directly to GPU dies for graphics card cooling. The paste has a viscosity of 850 poise, making it easy to spread without being too runny. It is non-conductive, so it is safe for use on exposed components. However, for extreme overclocking or high-power CPUs (e.g., 150W+ TDP), the MX-4's 8.5 W/mK thermal conductivity may be insufficient. In such cases, consider higher-performance pastes like Thermal Grizzly Kryonaut or Noctua NT-H2. The MX-4 is also compatible with thermal pads, but it is designed to replace them for direct die contact.

Product Info

The ARCTIC MX-4 has been on the market for many years, consistently receiving positive reviews. The 20-gram package is available widely through online retailers, typically priced around ¥2,000 to ¥2,500. It offers a thermal conductivity of 8.5 W/mK, an operating temperature range of -50°C to 150°C, and a density of 2.5 g/cm³. The paste is non-conductive and non-capacitive, ensuring safety. Positioned as an entry-level to mid-range product, the MX-4 competes well against other budget pastes like Arctic Silver 5 and Cooler Master MasterGel Maker. Its long-term stability and ease of use make it a favorite among system integrators and casual builders.

Best Use Cases

First-time PC builders: The MX-4 is forgiving and easy to apply, with clear instructions included. Beginners can safely apply it without worrying about short circuits. This is the best choice for those building their first gaming or work PC. Budget-conscious users: At under ¥2,000 for 20g, the cost per application is very low. You can use it for multiple CPUs and GPUs, making it ideal for building several systems or helping friends with their builds. The performance is sufficient for most mainstream CPUs (up to Ryzen 7 or Core i7). Office and light gaming PCs: Users with low-to-mid range CPUs (e.g., Core i3, Ryzen 5) will find the MX-4 more than adequate. It keeps temperatures in check without overkill. If you are not overclocking, this paste will last years without degradation. Not recommended for: Extreme overclockers seeking maximum thermal transfer, or those using high-TDP CPUs (150W+) in all-core workloads. Also, if you only need a single application, the 20g size is overkill; consider a smaller syringe (4g or 8g) to save money and waste.

Things to Consider

While the MX-4 is a reliable product, its thermal conductivity of 8.5 W/mK is not the highest in its class. For example, Thermal Grizzly Kryonaut measures 12.5 W/mK, and Noctua NT-H2 is around 8.5 W/mK as well but with better longevity. If you are using a high-end CPU like the Ryzen 9 7950X or Core i9-13900K under heavy load, the MX-4 may result in slightly higher temperatures compared to premium pastes. Another consideration is the syringe size. The 20g variant is best for users who build multiple systems. For a single build, a 4g or 8g tube is more economical and reduces waste. Also, the syringe tip is relatively narrow; applying too much pressure can dispense a large blob, so start with gentle pressure. Lastly, the MX-4 is not suitable for liquid metal applications. It is a standard silicone-based paste, so if you require the highest thermal transfer (e.g., for delidding or extreme overclocking), look for liquid metal products. ## FAQ
Q: How long does the MX-4 last before needing replacement? A: Typically, 3 to 5 years without significant degradation. However, it is good practice to reapply thermal paste whenever you remove the CPU cooler for maintenance or upgrades. Q: Can I use MX-4 on an AMD Ryzen 7000 series (AM5) CPU? A: Yes, it is fully compatible with AM5 sockets. The paste is applied the same way as on AM4. Be careful not to use too much because the AM5 IHS is slightly larger, but the standard pea-sized dot works

Product Disclosure (Amazon)

  • Manufacturer: ARCTIC
  • Seller: ARCTIC HK Ltd
  • Fulfilled by: Amazon
  • ASIN: B07LDJY4X2
  • Note: This article covers a manufacturer-made product based on Amazon listing details.