Antec Kühler H20 620 & 920 CPU Water Cooling Units

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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.

First metal pegs are inserted into the appropriate mounting holes of the plastic backplate. Double-sided adhesive is applied to keep it in place.

On the other side, a metal ring is utilized to hook into the plastic tabs running around the rim of the heat exchanger. Little plastic cups with holes in them direct the bolts to the right spots on the backplate.

The ring should be secured loosely so the heat exchanger can finagled into place before being tightened.

The 620 fully installed. Note how the plastic cups have all cracked after tightening the bolts. It doesn't effect anything as far as we can tell, but it's an odd sight.

The 920 has a nice set of LEDs lighting up the Antec marquee. The color can be changed via the included software.

As we use an open test platform for heatsinks, we placed the radiator on a foam stand designed to eliminate vibration effects. During testing it was placed in a position similar to a rear 120 mm fan placement with respect to the motherboard. Note the very short 15 cm fan cable; if you decide to power the stock fan(s) separately from the pump, an extension cable will likely be required.

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