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Water Blocks > Pacific M3
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Thermaltake Pacific M3 Motherboard Water Block (MSI Z170A Gaming M5)
Thermaltake’s new Pacific M3 Motherboard Water Block delivers extreme cooling performance and compatibility for custom PC builders, designed exclusively for Intel LGA1511 socket type CPU. Featuring 0.15mm internal fin construction, the Pacific M3 is a very high flow water block which water flows directly over all critical areas, providing the ultimate in cooling performance.
Tt LCS Certified is a Thermaltake exclusive certification applied only to products that pass the design and hardcore enthusiasts standards that a true LCS chassis should hold to. The Tt LCS certification was created so that we at Thermaltake can indicate to all power users which chassis have been tested to be best compatible with extreme liquid cooling configurations, ensuring you get the best performance from the best features and fitment.
Comprehensive Cooling Solution
Made in Taiwan, the Pacific M3 is a comprehensive liquid cooling solution, directly covering Intel LGA 1151 socket type CPU and power regulation (MOSFET) module. The full block has G1/4 thread ports to accept any of the industry standard fittings and comes with all required mounting hardware.

Optimized Micro-Channel Structure
The Pacific M3 Water Block is designed with a compact form factor featuring 0.15mm micro-channel fin construction for optimal clearance and extreme heat dissipation.
Remarkable Expansion
Designed to fit only Intel LGA1151 CPU socket, the Pacific M3 allows enthusiasts to build superior water cooling systems from an aesthetic standpoint as well as incorporate modular chassis upgrades for the future.


Thermaltake recommends the following steps to be taken before using the Pacific series radiators and water blocks
  1. To ensure a clean loop, flush and rinse your radiators and water blocks with distilled water prior to use.
  2. Do not use tap water or distilled water as your coolant, it may harm your loop and reduce performance.
  3. It is strongly recommended to use market proven pre-mix coolant, such as Thermaltake Coolant 1000. It offers great performance while protecting the entire liquid loop from corrosion.
  4. Before storing your water cooling components, please clean, rinse and dry. This will ensure a longer lifespan for your components.

Thermaltake recommends the following steps to be taken after completing your water loop setup
  1. It is strongly recommended to use market proven pre-mix coolant, such as Thermaltake Coolant 1000. It offers great performance while preventing the entire cooling system – copper, brass, nickel, aluminum, and steel – from corrosion.
  2. Fill the reservoir with coolant and cycle the power on and off several times while the pump pushing the coolant into the loop.
  3. DO NOT let the pump run dry, when there is no liquid entering the pump turn off your power immediately
  4. Fill the reservoir to the top as it will prevent air from going into the pump
  5. If necessary tilt the system slightly from side to side to bleed the air out of the loop.
  6. Place some paper towels under fittings and joining points to test for leaks.
  7. Run the loop with the fill port open for about 24 hours to completely bleed the air out of the loop