Arctic's Liquid Freezer 240 ships fully assembled, plumbed and filled. The whole system weighs around 1190grams and installs onto Intel socket LGA115x/2011(-3) processors and AMD socket AM2/AM3/FM1/FM2 CPUs. The four 120mm PWM fans operate at 1350-500RPM and feature 54mm long Y-splitter power leads, which is kind of nice.

For the curious, the temperature difference between inlet and outlet coolant was 4.1°C, this is of course while the heat exchanger was operating with just two rear fans drawing cooler air in through the heat exchanger.

The Liquid Freezer 240's heat exchanger uses a simple parallel flow path.

Liquid-to-Air Heat Exchanger

Arctic's Liquid Freezer 240 utilizes an all-aluminum heat exchanger that's 38mm thick, 273mm long and 120mm wide. Arctic supply four fans with the Liquid Freezer 240, each capable of spinning at 1350-500RPM to drive upwards of 74CFM according to manufacturer specs. That's a lot of airflow, so it's equally important that whatever computer case potential users install this cooler into, that it also have excellent intake venting or this heatsink might be starved for airflow.

It should go without saying that you'll need a PC case with a pair of 120mm fan mounting points along the rear or top panel to facilitate mounting the Liquid Freezer 240's heat exchanger.

The manufacturer supplies long mounting screws which are intended to pass through the chassis fan vent, fan and thread into the heat exchanger body.

CPU-to-Liquid Heat Exchanger

To reduce the amount of audible pump noise, Arctic have taken the unusual approach of inserting a small die-cut bit of sound absorbing foam in the upper half of the waterblock head. Kind of clever, more manufacturers should follow this lead.

Sitting below the foam is a smallish, ~30mm diameter pump motor. Most of the waterblock's volume is empty space; this has the benefit of reducing the thermal mass of the block, which helps the coolant more rapidly drop the CPU temperature. Of course, if the coolant stops for any reason the opposite holds equally true - CPU temps skyrocket RAPIDLY. Next to the pump motor is a bleed port which is probably used to syphon off trapped air when the system is first filled with coolant at the factory. The port is sealed with a stainless steel screw and rubber washer.

The working side of the Liquid Freezer 240's waterblock contains a micro-skived copper plate into which coolant flows. Propylene Glycol based coolant is pumped in through a slit along the center-line of the plate, before flowing out through miniature skived copper fins where it picks up the heat. The heated coolant then exits at the sides where it is pumped to the aluminum liquid-to-air heat exchanger.

The screws holding the copper plate on are a little too soft to undo, so we weren't able to remove the plate for a closer look at the skived liquid-to-CPU heat exchanger. Based on previous waterblock designs, we'd estimate the finned area is roughly 32mm square.

Installation Hardware