DeepCool LT720 – Solid cooler with a gorgeous block

Key Features

The LT720 cooler is the top of the range from DeepCool. It is a classic 360mm liquid all-in-one cooler that should offer an interesting price/performance ratio. At first glance, it will catch your eye with its visual design that combines simple geometry and a mirror effect with RGB backlighting. Above all, however, coolers should perform well without being too noisy. So let’s see how well the LT720 does in our tests.

Key features of the cooler

The LT720 fits perfectly into DeepCool’s current visual concept, which is characterized by its emphasis on modern design with sharply cut edges. The entire exterior of the cooler is sharply cut and clean with simple geometry. The pump cover stands out the most, of course, resembling a clear crystal emerging from the metal, but the cover material itself is of course plastic. Underneath the transparent part of the cover hides a 5V ARGB LED strip, which provides an impressive spectacle in the form of a combination of geometric shapes and an infinity mirror effect. The manufacturer refers to the effect as a “three-dimensional infinity mirror” and takes inspiration from the work of Piet Mondrian, whose work is characterised by a combination of simple shapes and primary colours.

This designer cover hides a pump underneath, to which it is attached by four magnets. The cooler uses a fourth generation pump developed directly by DeepCool engineers. This is not a generic Asetek design, as can be seen in the shape and size of the cooling block’s coldplate. A layer of thermal paste is also applied to this area from the factory to make installation as easy as possible.

   

A cable comes out of the pump which provides power and a speed monitoring signal. Unfortunately, the pump cannot be regulated using pulse width modulation (PWM) signals, but regulation using linear voltage (DC) works well. Swivel fittings on the block provide for easier routing of tubing that carries liquid to and from the radiator, and the tubes are nylon braided for durability and a more attractive appearance. A useful detail is the two plastic clips on the tubes for a neater appearance of the cooler in the build. I would appreciate if more cooler manufacturers took inspiration from this solution. Another interesting feature is the implementation of “Anti-Leak Tech” in this cooler. The name may be a bit of an exaggeration. It does not mean that this cooler can never leak liquid. However, there is a small expansion membrane integrated in the circuit to compensate for pressure fluctuations in the circuit due to temperature changes during cooler operation, resulting in a reduced risk of liquid leakage due to excessive liquid pressure.

   

The contents of the cooler package are pretty standard. In the accessories you will find all the necessary parts to install the cooler on the processor, where you just need to choose the right set of parts according to the socket. There are also a dozen 5mm screws to attach the radiator to the computer case and a cable splitter to connect all three fans to a single header on the motherboard. As I mentioned in the previous text, you will find a layer of thermal paste applied to the base of the cooler from the factory. Unfortunately, however, a tube of replacement paste is missing from the supplied accessories. I always criticize this step, because it is a completely unnecessary saving in the wrong place.

   

As usual, when installing the cooler on AMD processors, you use the motherboard’s native backplate. For Intel processors you use the supplied backplate with adjustable screw spacing according to the socket – LGA 1700 has a slightly wider hole spacing in the board compared to LGA 1200/115x. The installation of the cooler itself could be a bit easier, but it is still not complicated. Everything is detailed in the clear user manual. DeepCool also recommends that for optimal cooler effectiveness, the pump block should be installed with the fittings and tubing extending out of the block towards the bottom of the case. The orientation of the manufacturer’s logo on the pump cover serves as an aid.

Pump, radiator and fan parameters

DeepCool LT720 does not stand out from its class of coolers except for a slightly longer radiator than other manufacturers use. The length of the radiator is slightly over 400 mm, which needs to be taken into account in terms of compatibility with the computer case. The LT720 is priced very reasonably and will certainly put pressure on the competition. A nice bonus is also the support for AMD Threadripper processors, which is not quite common with all coolers. I’m just a little worried that the contact area of the cooler won’t sufficiently cover the entire heat spreader of high-end AMD processors.

The supplied FK120 fans are also used by DeepCool for its AK series air coolers. On paper they look impressive, but unfortunately these specifications are not comparable between manufacturers and without a unified methodology they don’t have much relevance. I list them here more for reference and partly out of some inertia.

• Contents
• Key Features
• Measurement methodology
• Results – 36 dBA
• Results – 39 dBA
• Results – 42 dBA
• Results – 45; 48 and 51 dBA
• Results – maximum speed
• Conclusion and evaluation

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