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.


The Bitspower Summit EF-X is marketed as an "extreme flow" block, and based on these results, that is quite true. It is among the least restrictive CPU blocks available today, at least if you consider blocks readily available and not EOL. This is good news for those with pumps that do not have a lot of head pressure, as CPU blocks tend to be the most restrictive element in a watercooling loop. A lot of this has to do with the smaller microfin and microchannel area, as well as the lower-than-average number of fins and channels. The large cavity opening would also help with flow.