Alphacool NexXxoS XT45 360 Radiator

Posted: April 15, 2012 in Radiators
Tags: , , , ,

Restriction Testing

Continuing the same test method as before, I’m measuring restriction or pressure drop over the range of possible flow rates to get a complete look.  I simply increase flow across the radiator at .5 GPM increments and record the pressure drop across the rad via manometer.  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.

Radiators are generally pretty low in restriction, so this is normally not something to worry about much unless you plan to run several radiators in series.

First the detailed results:

Followed by a comparison:

Restriction is very low, just a hair higher than the HWlabs SR1.  It’s not quite down at UT60,RX360,G-Changer levels, but still very low.  It is less than 1/3rd as restrictive as a low restriction CPU block so you should have no worries about connecting several of these together in series if needed.

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  1. toooooot says:

    Cool review, thanks. I decided to change swiftech 320 quiet power to Alphacool NexXxoS XT45 Full Copper 240mm to fit it inside the case. Hopefully, it would still be enough to cool 1 cpu and 1 gpu.

    • Martinm210 says:

      Thanks! Its a nice rad, probably not quite as much cooling power as the 320, but you may not notice much if any difference. Push + Pull on fans will alway provide a nice 30% boost as well if it fits.

  2. C Smyth says:

    Very impressive consistent testing. I have a question. I have a Corsair 550d which is not that conducive to water cooling with 45mm (XT45) or 60mm (UT60) thick radiators. Because of the impressive results seen with both the XT45 and UT60 I wanted to buy Alphacool radiators. Someone mentioned that there is a 30mm (XT30) that Alphacool sells. I can only find ST30. Is this the same thing, just called ST30 to designate slim instead of XT30? If it’s not the same radiator as the XT45 or UT60 line, do you have one or two other manufacturer recommendations for slim radiators that are on par with Alphacool’s? (Low fan speed, less than 1500rpm).
    Thanks again for provided such an extensive knowledge base to learn from Martin!

    • Martinm210 says:

      Yes, it is the ST30 which I also tested. It is optimized for slower speed fans and very much the same at the other Alphacool rads except it is slim thickness and doesn’t have the alternate ports. Awesome slim radiator though with full copper construction and all.

  3. Michael | NinjaSushi2 says:

    Martin! Love your work man. Been following you since I saw you on OCN.