This is #10 in my series of triple radiators the Alphacool NexXxos XT45. We saw how “Full Copper” of the thicker 60mm UT60 did extremely well in performance and the XT45 shares that same full copper construction in a slimmer 45mm thickness with a few less features. I have been finding this brass vs copper tubes difference rather interesting after seeing the UT60 vs G-Changer results, so I expected good things to come out of this slimmer XT45 in all it’s slimmer but still copper tube glory.
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A special thanks to Aquatuning for providing the review sample:
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The XT45 sporting a pair of Monsoon fittings and ready for action!
Specifications:
http://www.aquatuning.us/product_info.php/info/p12340_Alphacool-NexXxoS-XT45-Full-Copper-360mm.html
Description
The new Alphacool NexXxos radiators, a name that stands for experience and quality has come to bring a fresh breeze to the radiator market.
Every user of a water cooling system needs a radiator and everyone has different requirements towards the heat exchanger. Of course the customer always demands the best in its class. The Alphacool NexXxos radiators have come to compete with and to beat the best in their class and to be the best radiator in all sizes. No more endless choices without a clear class leader, the Alphacool NexXxos is the one tool for all your needs!
Alphacool has been the company to introduce new developments and improvements in the radiator and water cooling sector generally many times over the last years.
Following this tradition, the new NexXxos radiators are the first to truly deserve the “Full copper” attribute. All main parts, not only the fins and channels, but the chambers are also made from copper. This brings an improvement in performance where other radiators are left without a chance. The material already gives an advantage over the competition and the inner structure is up to par with the competition. Separated chambers give the coolant a clear direction, allowing high flow rates which improve the performance of the whole cooling loop.
Flat chambers on the heat exchanger increase mounting flexibility thanks to the reduced overall length.Versatile and easy mounting is one of the main points, on which the research and development department at Alphacool focused. The chamber offers three possibilities for fitting installation on both inlet and outlet (not on the NexXos ST30). Less angled fittings are needed, improving flow rates and offering more mounting possibilities. Hence the radiator can even be installed in tight enclosures, where otherwise internal installation is not a possibility. A 1/4″ screw plug allows easy de-aeration of the radiator (on all UT60 and NexXxos Monsta) and hassle-free vertical installation of the heat exchanger. The threaded opening can even be used for filling, e.g. in combination with a Fillport.
Versatility is the essence of the new NexXxos series! The radiators are designed to be used with 120mm as well as 140mm fans and are available in different thicknesses. The choice of 30mm, 45mm and 60mm offers the perfect radiator for every purpose. Even mounting and installation of fans and radiator grills is easy and versatile with these radiators: The M3 threads are standard in the radiator sector and available in all lengths at an affordable price.
Even the dreaded insertion of a screw too far into the radiator does not result in expensive damage. Unlike other radiators, the NexXxos series is equipped with an internal protective ledge which stops the screw before it damages the fins.Fin spacing is always an important factor in radiator design. The new series from Alphacool has a fin design which allows it to perform extremely well even with slow-spinning and medium-speed fans. This is not only pleasant thanks to the fact that it avoids unnecessary noise; it also means that the choice of fans that can be used with these radiators is not restricted.
These radiators are the result of experience and powerful performance meeting future-oriented design and well-thought through solutions.
Alphacool NexXxos radiators: The one tool for all your cooling needs!
Technical specifications:
Material internal: Mostly copper
Material casing: Side panels steel, threads brass, copper chambers
Colour: Black
Dimensions (LxWxH): 400x124x46mm
Connection threads: 6×1/4“
Mounting thread size: M3
Pressure tested: 1.5bar
Weight: 1515gExtent of delivery:
1x Radiator
4x Copper-plated screw plug
12x Copper-plated M3x30mm hexagon socket screw
12x Copper-plated M3x35mm hexagon socket screw
The most important specification is the note about copper chambers as that seems to be making a difference in performance but also note the slimmer 46mm thickness.
martinsliquidlab.wordpress.com 
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.
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.
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!
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.
Martin! Love your work man. Been following you since I saw you on OCN.