ARCTIC Liquid Freezer III 420 A-RGB - CPU AIO Water Cooler, Water Cooling PC, Intel & AMD, Efficient PWM-Controlled Pump, Fan: 200–1900 RPM, LGA1851 and LGA1700 Contact Frame - Black

- Effortlessly cools my Ryzen 9 5900x w/ PBO limits @ 200/185/130 - Idles at 40c , maxes out at 85c. For these power limits, that's impressive. - Extremely quiet... I actually had to look in the case to make sure the fans were spinning. Yeah, it's that quiet. Even when it's running max speed. Unreal! -It comes nicely cable managed and you can choose between 1 connection on the board or 3 in case you want to control the fans, pump and VRM fan separately. The VRM fan is a nice touch - keeping your VRMs cool can prevent little drops in voltage which in theory will keep your CPUs boost behavior more consistent. - Installation went okay, just make sure you have clearance. For what this is, I can't believe the price. I am very happy with my purchase. Just make sure you have a ginormous case with explicit 420mm radiator compatibility and enough verticality over the motherboard (if you are top mounting) to make room for the thick radiator on this thing. I even had some clearance issues (8-pin power for the VRM blocked the radiator) in my Thermaltake View 71 TG RGB. Had to get a little... creative. Another thing to bear in mind - that VRM fan that magnets to the pump/block - the blades visible from the front do not spin. Those just light up. The actual VRM fan is on that same part, but below and tucked away. Really, the only thing I can criticize is the length of the header cables... if they were longer you could more easily cable manage them.

After running a 360mm EK AIO for a while, I decided to upgrade to the ARCTIC Liquid Freezer II 420 A-RGB — not because of thermal issues, but to improve airflow throughout my HAVN case. I wanted all fans to be 140mm for consistency, better aesthetics, and improved internal airflow. Why I Chose This Cooler The standout feature for me was the small VRM fan built into the pump cap. It’s a thoughtful design — that small fan helps circulate air around critical components like the VRMs, RAM, GPU, and NVMe drives. In a tightly packed system, that airflow matters more than people give it credit for. Real-World Performance I was especially curious to see how it would perform with higher power BIOS settings, which used to push my EK 360mm into thermal throttling. The difference was immediate: • The 360mm would quickly throttle under high load, catch up, then throttle again. • The 420mm kept up from the start — no thermal throttling, even under sustained high-power workloads. Under long-duration CPU stress, the ARCTIC 420mm still ran about 3°C cooler than the 360mm. That part I expected. What I didn’t expect was how much better it handled rapid temperature fluctuations — scenarios where the system goes from idle to load instantly. The ARCTIC simply reacted faster and more effectively. Final Thoughts This cooler isn’t just about raw thermal performance — it’s about thermal control and stability. The build quality is solid, the 140mm A-RGB fans are quiet and efficient, and the integrated VRM fan adds practical cooling benefits in real-world builds like the HAVN. If you’re pushing high power settings or want maximum cooling headroom without going custom loop, this is an excellent upgrade.

Probably the best AIO out there if you can fit it in your case. Great value for what you pay. Keeps my 9950x cool under a work load. Pretty quiet as well with the 140mm fans and large size radiator.

Great product. It's been running for years and still performing like it is supposed to.

This isn't some secret technology. It's a very simple design that has high quality parts and almost twice as much heat transmission than other comeptitors. The radiator is 80% thicker than all other brands which is why this cools so much. Running Ryzen 9 9950x at peak performance with top heat of 72 deg C. Had multiple other name brands and they were all near 90 deg C. Check your system for room. The radiator thickness may not fit your build or require modification. I was able to make this work in a ThermalTake Tower 300 mATX build with trimming the side HD mounting panel.

I recently built a high end system with a intel Core ultra-9 285k cpu. I paired this with Artic's 420mm Aio which uses a contact frame and 3 140mm fans for cooling. The installation was very easy and I really liked the contact frame instead of using Intel's regular cpu holder that has had many issues with deforming the cpu. Artic provides their Mx-6 thermal paste and it works great. I also really liked the vrm fan they use in combination with the pump system. The 140mm fans are very quiet, mine also had the Rgb lighting, a nice touch. After completing the build, the cpu temps are very good, 28-30 deg C at idle and only 60-65 deg C running Cinebench-23 to test the system. The overall build quality is very good and I would highly recommend this aio cooler to anyone building a high performance system that has a large case using the latest intel processors. Great job Artic!!

This is the end all be all cooler if you have the case for it. Keeps my 9800x3d OC under 65c @ 5.7ghz all core.

Thermal performance and noise are over the top awesome. Coming from a Liquid Freezer II 360, I'm having a hard time even hearing the fans and the temps are down about 5 deg C on a 7950x3D. No brainer upgrade for my aging unit that is full of lint and probably clogged with gunk in the cold plate. Installation on the AM5 platform is on the other hand the one knock against it. I got a Kryosheet to try out for my first time with this AIO and almost destroyed it in the process of trying to get the two spring plate screws engaged. It took me quite a few tries and a forehead full of frustration sweat. The solution is probably pretty easy for Arctic to implement... Make the engagement length of the screws longer before it actually starts torquing down on the spring plate. The fact that the screws start out bowed out to the sides doesn't help with alignment either. I made it work but I'm also an engineer and deal with stuff like this in my sleep. A rookie kid trying to install this is potentially going to destroy something, or at the very least strip the first threads on the screw which is going to end in frustration and RMAs for at least one component if not a lot more...$$$ These issues were detailed in Gamers Nexus reviews and they had the same issues. I made it work because I knew about it ahead of time and I also know how to deal with such things. A noob won't find it so easy. TLDR: great performance, tricky installation. Would I recommend it?? Eh... depends who is asking for the recommendation.

Très bon produit par contre il est très imposant, on voit avec l'augmentation de la taille des composants (AIO, CG, ..) un retour en arrière par rapport à l'époque de tout faire en miniature. Actuellement c'est très compliqué de trouver un boitier adapté à la taille 420 mm pour l'AIO (et certains ne le propose qu'en façade). Le packaging m'a surpris, un triangle un peu particulier relié sur lui même, attention au déballage pour les pièces accessoires. Le gros avantage est que les ventilo sont déjà installés, vous n'avez pas à vous prendre la tête sur le câble management. Et pour finir, il fait le job pour lequel on l'a acheté, refroidir le processeur. Et à ce niveau on voit une nette différence, Arctic c'est super efficace et abordable question prix. Pas besoin d'acheter 2 fois plus cher les marques les plus connues. Cerise sur le gâteau c'est 6 ans de garantie.

انا جربته على i9 14900 جميل توصل الحراره ٨٩ او ٩٢ من اكثر من اختبار بالضغط يفضل تشوف مبرد اقوى يمكن يكون افضل للمعالج هذاا

The ARCTIC Liquid Freezer III 420 A-RGB is an outstanding water-cooling solution that has significantly improved my PC's thermal performance. The cooling power of this unit is remarkable, keeping my CPU temperatures impressively low even under heavy loads. The large 420mm radiator, combined with the powerful fans, provides excellent airflow, ensuring that my system stays cool and stable during demanding tasks. The A-RGB lighting adds a sleek, customizable touch to my build, making it not only a high-performing piece of hardware but also visually appealing. The lighting effects are vibrant and smooth, and they integrate well with the rest of my RGB setup. Installation was straightforward, and I appreciated the quality of the components, from the tubing to the fans. The included VRM fan control is a nice bonus, allowing for quiet operation when full power isn't needed. Overall, the ARCTIC Liquid Freezer III 420 A-RGB delivers exceptional cooling performance with the added flair of customizable lighting. It's an excellent choice for anyone looking to keep their system cool while adding some visual appeal to their build

冷えますね。 RGB はイマイチな感じはします。そこは減点。 でも、この価格でこの性能であれば今後も使っていきたいと思います。

Best AIO i have owned for my 13900k, after trying several brands, majority had louder pump noise, this one doesn't, keeps everything cool and has a lot of head room for OC. Great price / performance