ARCTIC Liquid Freezer III Pro 420 - AIO CPU Cooler, 3 x 140 mm Water Cooling, 38 mm Radiator, PWM Pump, VRM Fan, AMD AM5/AM4, Intel LGA1851/1770 Contact Frame - Black
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Availability:
In Stock.
Arrives
Sunday, Jul 26
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Features
- CONTACT FRAME FOR INTEL LGA1851 | LGA1700: Optimized contact pressure distribution for longer CPU life and better heat dissipation
- ARCTIC's P14 PRO FAN: More power at any speed - more powerful and quieter than the P14, especially at low speeds. Higher maximum speed for optimal cooling performance under high load
- NATIVE OFFSET MOUNTING FOR INTEL AND AMD: Shifting the cold plate center towards the CPU hotspot ensures more efficient heat transfer
- INTEGRATED VRM FAN: PWM-controlled fan that lowers the temperature of the voltage converters and thus ensures reliable performance
- INTEGRATED CABLE MANAGEMENT: The PWM cables of the radiator fans are integrated in the sheathing of the hoses so that only a single visible cable is connected to the motherboard
Brand: ARCTIC
Power Connector Type: 4-Pin
Voltage: 12 Volts
Wattage: 4.2 watts
Cooling Method: Liquid
Compatible Devices: Desktop
Material: Metal, Plastic, Rubber
Maximum Rotational Speed: 2500 RPM
Air Flow Capacity: 110 Cubic Feet Per Minute
UPC:
Brand: ARCTIC
Power Connector Type: 4-Pin
Voltage: 12 Volts
Wattage: 4.2 watts
Cooling Method: Liquid
Compatible Devices: Desktop
Material: Metal, Plastic, Rubber
Maximum Rotational Speed: 2500 RPM
Air Flow Capacity: 110 Cubic Feet Per Minute
UPC: 840033403016
Global Trade Identification Number: 48
Manufacturer: ARCTIC
Number of Items: 1
Product Dimensions: 18.03 x 5.51 x 2.66 inches
Item Weight: 5.22 pounds
Item model number: LFIII Pro 420
Date First Available: February 27, 2025
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If you place your order now, the estimated arrival date for this product is:
Sunday, Jul 26
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To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Extremely well built, very easy to install, and surprisingly quiet. Haven't seen temps above 55° C since I installed it. NOTE: I must have missed it on the product page, but included with this AIO is their excellent MX-6 thermal paste---not pre-applied or some mass-produced ketchup packet, a commercially labeled tube of MX-6....I had to return the separate tube of MX-6 I had bought.
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Reviewed in the United States on October 9, 2025 by David Corn
I'm writing this as of 2 days of use after installation on an I9-14900k, one of the hottest-running and most troubled processors on the market. It is installed on the front panel of a Fractal North XL case, with fans in front in an intake configuration. This seems ideal to intake cold air instead of using the already hot air within the case to cool the radiator, and to avoid the convection heat from being at the top of the case. These conditions seem minimal but should increase thermal performance. The Bad: *Amazon lied about the shipping. Under the product listing, it claimed next day shipping, and then when it was in my cart it would only offer 2-day shipping. *Installation was a little weird as there was no rear bracket and I used the one I had from another aftermarket brace, which fit. Not a big deal for me, but some people may be confused or be missing a back bracket for LGA1700 chips. *Tightening the 2 screws on the pump header was a bit nerve-wracking since they had such heavy resistance and there's no physical instruction book. *The front panel of the Fractal North XL doesn't seem to click in fully with these big fans in the front, but I'll figure that out later. *The noise at full load is significant, but not really a problem for me since my headset has good ANC. *The "pseudo-fan with small fan inside" just magnetically clips onto the pump header. I'd feel better if it clipped on or screwed on. *The fan power cords that go through the water tubes are not long enough for the config I chose. I had to pinch the power cords a bit to get them in the front of the radiator. The Good: *That said, this cooler completely solved my temperature issues. I previously had an NXZT Kraken 360mm, and it was absolute garbage. One of the fan bearings went bad and made a ton of noise after just one year. The LED screen on the pump header never worked. It was either defective or just entirely inadequate for my processor, which is INSANE for how much I paid for that AIO (320$ at the time). I have been through hell trying to get this processor in a functional state between the BIOS updates and custom BIOS settings to limit voltage, and I was regularly pegging 100c on Battlefield 6 and other demanding games. I have it thermal throttled to 100c, but was is not ideal. *With the Liquid Freezer III Pro 420, I have not seen temps over 70c peak. Battlefield 6 causes that peak but runs at around 60-65c. Cities Skylines 2 is running at 55c currently. *The price point for this beast of a cooler cannot be beaten, especially if you don't need the LED version. All the bad points honestly negated by how relieved I am that I have my temps under control with this ridiculous processor plagued by issues. Whoever wrote the default intel settings and/or bios code must have lazily used AI and didn't troubleshoot or test it at all.
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Reviewed in the United States on November 24, 2025 by Troy
Fantastic AIO for the serious PC enthusiast with no RGB junk. Being a 420mm makes sure your case has room for it first off. Person's that have trouble installing it are either not making sure it will fit first off, or not experienced in AIO installs and how to do it. It's an easy install. If it is not, it's a keyboard chair issue. LOL
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Reviewed in the United States on December 7, 2025 by Rwarton
My first AIO that i have used before, i bought this for my AMD 9950x3d as i heard they run hotter than most AMD chips. I did not need and RGB or LCD so it saves on money for the same performance. The 420mm is probably overkill but it fit the NZXT H9 Flow very well. The Asus X870E-E i used this on worked but i had to remove one of the big heat sinks for the M.2 it came with so the lower ports on the pump would clear. The MX6 paste it came with was terrible or maybe mine was all dried up, it was the consistency of clay and would not spread evenly once pressed on with the cooler. I used Corsair TM30 and it works great. Once you get it all installed which is easy, you can either use the all in one cable if you have limited CPU slots and no pump slot or they offer the segregated cabled to have individual control from pump to fans, i suggest using that one if you can. Fans are quiet as i tuned them with the BIOS software in the Qtuner to keep them quiet and cool, it works great, very low noise from the whole setup if properly tuned. I used this in this NZXT H9 Flow case and used all Be Quiet PWM fans so they can all be tuned. The whole goal is quiet and cool. AMD 9950x3d - 4070ti.
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Reviewed in the United States on December 13, 2025 by Ben Ben
It’s a 420mm aio at around the price of a 360 which is what drew me to it, does everything you would expect with some nice quality of life features as well. The tubing is long enough for basically any mounting orientation, the built in cable management for the fan wires and motherboard headers is great although I prefer to have separate control of fan speed and pump speed so I wound up with a few loose cables I had to manage myself. The mounting process was about as easy it can be for a radiator of this size, DEFINITELY take note of the space available in your case the combined thickness of the fans and the radiator itself can be a challenge. I should note however I had already planned on using an am5 contact plate that I had purchased myself so I can’t speak to how easily the heatsink installs over a traditional socket cover. The cooling performance has been great, I have been able to take advantage of a much more conservative fan curve and still maintain acceptable temperatures. I have mostly small gripes. There were no included instructions but a QR code in their place, maybe that won’t bother some but I don't enjoy having to navigate websites on mobile especially when it comes to looking at pictures. The included thermal paste tube is enough for basically a single install, two if you’re being extra frugal, which isn’t a big deal just something I wish cooler manufacturers at large would be better at. Overall I recommend, I mean it’s just a bigger version of the Liquid Freezer III 360mm after all, so it was bound to be good.
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Reviewed in the United States on July 14, 2025 by Jonathan
Keeps my 9800x3d nice and cool. Make sure you double check the dimensions of your case before ordering. This is coolers radiator + fan makes it thick. Also, the hose pipes are a bit stiff making it difficult to mount. The pump is not noisy either.
Reviewed in the United States on January 12, 2026 by Amazon Customer