The MCR120-QP (Quiet Power™) is a heavy-duty liquid-to-air heat exchanger designed to be used with 120mm class fans, and specifically engineered for high-end liquid cooled Personal Computers. The Quiet Power™ technology is the result of months of research and development focused on optimizing thermal performance and audible noise characteristics with low to medium airflow types of fans.
The MCR120 -QP heat exchangers have been engineered to meet today's PC industry highest thermal loads, quality standards, and low noise requirements at competitive prices.
The new Quiet Power design yields higher performance than previous MCR120 model, and delivers ample heat dissipation headroom for the most demanding applications
Optimized for 120mm fans with low to medium output (80 CFM and below)
Flat brass tubes and louvered copper fins, with brass plenum chambers and frame construction, for optimum thermal conductivity.
Fin density optimized to reduce air noise
Flat frame surface provides optimum seal to the fans
Built-in plenum chamber
Performance Curves "The old against the new "
"MCR120-QP" Denotes the new Quiet Power serieswhereas "MCR120" or "MCR Old" denotes the earlier MCR120 models
Click picture to zoom in - Lower is better
In the comparative curves below, the MCR120 "Quiet Power " version shows a lower pressure drop (an improvement) at all flow rates over the earlier MCR120
Click picture to zoom in - Higher is better
In the above curves, we show the heat dissipation performance of the MCR120-QP with our Delta M class 120mm fan running at 12, 7 and 5 Volt. For additional reference, we also show: a high-flow/high noise Delta HE class fan, a low flow/low noise Papst fan, the MCR120-Old with our Delta M fan as a yellow curve, and Noise levels for all fans tested.
Knowing that typical Swiftech systems operate in the 1.25 GPM range, several observations can be made from the above:
With the same Medium output Delta M fan, the MCR120-QP dissipates ~5% more heat than the earlier version, across all "real-life" flow rates. There are little gains to be made from increasing the flow rates over 2~2.5 GPM. For extreme low noise applications, a"specialty " fan such as the tested Papst delivers comparatively better performance than an under-volted fan such as the Delta M. Nonetheless, the Delta at 7 Volts offers whipser-quiet operations while supporting the power range of most desktop CPU's on the market (120W) and maintaining only a 10°C temperature rise of the coolant over ambient air. We also see that the same is not true when the fan operates at 5v. At this low voltage, we can predict from the curve that any heat load in excess of 75Watts will cause the coolant temperature to rise above 10°C. The next set of curves will then be useful to calculate what the rise will be.
The above curves are very similar to waterblock C/W data and can be interpreted in the same fashion. They will allow users to estimate the temperature rise of the water in the circuit, based on the coolant flow rate.
We can use the curve of the Delta 1212M running at 5 volt to illustrate how to calculate the coolant temperature rise over ambient air. Assuming for example a Swiftech loop flowing 1.25 GPM, and a CPU heat load of 100 Watts, at 5v the C/W of the radiator would be 0.13, and the coolant temperature rise above ambient would be 100 Watts x 0.13 = 13°C.
Manufacturer specifications for fans used in the above tests
StaticInH20
VolumeCFM
Noisedb(A)
The MCR120-QP Heat exchangers are sold in 3 configurations:
Fan specifications:
MB-120 "Radbox" Specifications page
DIMENSIONS - CLICK TO ZOOM IN
