Cooler Master Seidon 240M: Dual Fan Liquid CPU Cooler

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The most critical aspect of installation is that the heatsink be securely mounted. A firm mating results in good contact between the heatsink's base and the CPU heatspreader and more efficient heat conduction. Ideally it should also be a simple procedure with the user having to handle as few pieces of hardware as possible.

The mounting hardware is a stark contrast to water cooling units we've previously reviewed. Instead of plastic spacers and interlocking metal rings and hooks, there is just a simple bolt-thru backplate system.

For Intel boards, both backplate and mounting clips have easily adjustable screws/bolts conforming to the various mounting hole arrangements of the past few generations of Intel processors.

The mounting clips are screwed onto the base from the bottom which isn't ideal for maximizing pressure. We did notice some bending of the clips after installation.

Thick steel nuts are fasted to the backplate screws using a conveniently included nut-driver.

The spring-loaded bolts are secured to the nuts and the base is successfully mounted. The base is fairly compact — one of the big advantages of watercooling is it bypasses most CPU heatsink height limitations. Unfortunately, the dual fan radiator makes it incompatible with most smaller cases.

The fans are bolted to the radiator side-by-side and the entire structure is screwed into the top of the case. The side with the tubing protrudes 19 mm past the edge of the fan while an additional 15 mm of clearance is required on the opposite side. For our usual open test platform we positioned the radiator about half an inch away from the top of the motherboard but we also arranged an in-system test as well.

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