XSPC X2O 500 Single Bay Acrylic Reservoir Pump

Posted: January 18, 2013 in Pumps
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Pump Pressure Vs Flow Rate Testing

Continuing the same test method as before, I’m measuring the pressure capabilities over the complete spectrum of possible restriction scenarios to develop the pump curve.  I simply adjust the restriction via my King valve at .5 GPM increments and record the pressure gain or TDH across the pump.  My flow meter is a King Instruments 7520 with valve, my manometer is a Dwyer 477-5 digital manometer, and I have fabricated my own 1/2″copper x 1/4″ brass T fittings to avoid adding restriction to the test.




There isn’t an RPM sensing wire, so that data is absent, but motor tested extremely well for it’s size.


Because most of my past testing has been focused on the extreme pumps, I don’t have much to compare in the All-in-one segment just yet.  To provide a better perspective, I looked for information about pumps that are included in the All-In-One kits such as the Corsair H100 and found some specs to use.

Per frosty tech’s review here, the H100 pump specs are as follows:

Pump Spec: 12V DC, 0.1A
Flow Rate: 2L/min
Head: 112cm H20

I used a couple of online conversion tools to convert the flow rate (0.53GPM) and head data (1.59 PSI)) into like units so I could plot that as another estimated pump curve.  As you would expect a CPU only pump in the AIO kits is adequate for CPU cooling, but don’t expect much more.


While not keeping up with it’s $160 D5 bayres brother, you can see that the X2O 500 is bridging the gap between an AIO cooler 1.2W pump and the D5 based 20W pump. This is a 4-5W pump and capable of much more than just CPU only loops.

To help demonstrate the expansion capability, I took the pump curve and entered it into my flow rate estimator tool and then calculated the flow rates using three conditions:

  • CPU + RAD
  • CPU + GPU + RAD + RAD
  • CPU + GPU + GPU (parallel) + RAD + RAD +RAD


Above is the dual GPU + triple RAD condition.


You actually have a touch more flow rate with the triple rad condition because the GPU blocks were run in parallel and the rads are low in restriction.

What this shows is the flow rates are still more than adequate.  If the radiators are added in sufficient capacity, the loss in flow rate accounts for less than 0.5C with the added components.  0.9GPM is plenty of flow and as long as you add additional radiators to remedy the heat added and take some care in using lower restriction parts, you should have no problem running fairly large loops.

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  1. Alan says:

    Thank you very much Martin! Your efforts are greatly appreciated, as always.

  2. Gary Stofer says:

    Thanks for the review Martin. As of today its not selling yet to resellers but I’m sure it will be soon. I’d like to see them get the housing black, aesthetics matter in our business.

    This really puts the H100 pump in perspective.

    • Martinm210 says:

      Thanks Gary,
      housing could be painted easy enough with the pump removable, but it would be nice to have it come in black as the factory color.

      I hope to round up an H100 pump to verify specs too there is not much for detail out there but planning to do some AIO kit testing in the near future and will break them down and test the pumps then. This H100 estimate is based on the specs I could find.

  3. […] een oplossing voor een reservoir en pomp, werd ik wel erg gecharmeerd door de volgende oplossing: XSPC X20 500 Single bay. Mijn vraag is dan ook gaat Highflow deze op de korte termijn (1 tot 2 maanden) kunnen leveren? Of […]

  4. kako says:

    Tried to get one of these…

    >>Sorry it’s not possible at the moment. We are not happy with the noise level of the pump and we decided not to release it.