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Liquid Flow Restriction

I used a Swiftech MCP50X pump with a FrozenQ 400mL cylindrical reservoir. 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 a previously calibrated in-line flow meter and a Dwyer 490 Series 1 wet-wet manometer to measure the pressure drop of the component being tested. Every component was connected to the manometer by the way of 1/2″ x 3/4″ tubing, compression fittings, and two T-fittings. Lower is better here.

I have here some entries that are GPU block, and GPU block + backplate. This was to merely distinguish each entry separately as it affects thermal performance, but of course as far as liquid flow restriction goes the presence or absence of a backplate matters not. As expected, the serial flow design coupled with the ~0.5 mm microchannels resulted with the XSPC Razor having higher liquid flow restriction relative to others that adopted split flow despite having thinner 0.4 mm microchannels. The actual difference is not a lot in the grand scheme of things, however, with only the Alphacool NexXxos GPX being a real outlier.


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