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Liquid flow restriction

Testing methodology

I used a Swiftech MCP50X pump with a FrozenQ 400mL cylindrical reservoir filled with distilled water. The pump was powered by a direct SATA connection to an EVGA 1300G2 PSU, and was controlled by an Aquacomputer Aquaero 6 XT. There was an in-line flow meter previously calibrated, as well as a Dwyer 490 Series 1 wet-wet manometer to measure the pressure drop of the component under test. Every component was connected by 1/2″ x 3/4″ tubing, compression fittings and 2 T-fittings with the manometer.

It’s at the point where that plot is cluttered with data. So here’s another which might be more helpful:

In case you can’t view the interactive image properly, here’s a direct link comparing the tested CPU waterblocks available for retail purchase: Pressure drop of CPU waterblocks at 1 GPM flow

The cuplex kyos NEXT has a higher than average liquid flow restriction, which I attribute to the increased density in the micro-fins and thinner micro-channels in a relatively small area as seen in page 2. It is still not as bad as the Swiftech Apogee XL or the Phobya UC-1 Extreme which are significantly higher and in a league of their own, but do be aware lest you attempt to get away with a pump that has low pressure head such as the low noise DC-LT from Alphacool which seems to have gained popularity in Europe lately. Let’s take a look at thermal performance on the next page now.

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