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ARCTIC

ARCTIC Liquid Freezer III Pro 420 A-RGB - AIO CPU Cooler, 3 x 140 mm Water Cooling, 38 mm Radiator, PWM Pump, VRM Fan, AM5/AM4, Intel LGA1851/1700 Contact Frame - Black

  • Based on 314 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jul 27
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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: 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

Description

Quieter and more powerful at low speeds, with more power reserves under load – for maximum cooling performance without compromise. Optimized contact pressure distribution for longer CPU lifespan and more efficient heat transfer. Pre-installed, pre-wired fans and animated instructions for straightforward installation. Improved heat dissipation and a larger fluid volume reduce heat buildup and allow for more efficient handling of temperature spikes. Case Compatibility Please note that the Liquid Freezer requires at least 63 mm of free space for installation. Decentralized Mounting Moves the cold plate to the CPU hotspot, ensuring more efficient heat transfer. Two Control Modes Control the pump, VRM, and radiator fans individually or via a PWM signal with an all-in-one cable. 60 mm Fan in CPU block Reduces the temperature of the voltage converters and ensures stable performance. Fan cables integrated into the sleeving simplify installation and reduce the necessary cabling to a minimum. Standardized 3-pin connector for high compatibility and control. Daisy chain and Gen 2 LEDs enable custom LED colors. Apply MX-6 in a cross pattern – the water pump's cold plate will distribute the paste evenly. Reinforced EPDM hose with braided braid for maximum durability. LF3 Pro 420 A-RGB (Black) LF3 Pro 360 - Black LF3 Pro 360 - Black LF3 Pro 280 A-RGB (Black) LF3 Pro 240 A-RGB (White) LF3 Pro 240 - Black

Product Dimensions: 17.5"L x 6"W x 2.7"H


Brand: ARCTIC


Power Connector Type: 4-Pin


Voltage: 12 Volts


Wattage: 4.2 watts


Cooling Method: Water


Compatible Devices: Desktop


Noise Level: 1 Sones


Material: Plastic


Maximum Rotational Speed: 2500 RPM


Power Connector Type: 4-Pin


Voltage: 12 Volts


Wattage: 4.2 watts


Cooling Method: Water


Compatible Devices: Desktop


Noise Level: 1 Sones


Maximum Rotational Speed: 2500 RPM


Air Flow Capacity: 110 Cubic Feet Per Minute


Item Dimensions L x W x H: 17.5"L x 6"W x 2.7"H


Material Type: Plastic


Brand Name: ARCTIC


UPC: 840033403023


Global Trade Identification Number: 23, 55


Warranty Description: 6 years


Manufacturer: ARCTIC


Number of Items: 1


Model: LFIII Pro 420 A-RGB nero


Part Number: ACFRE00185A


Item Weight: 2358 Grams


Included Components: Liquid Freezer III 420 A-RGB


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jul 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • IMO the best!
This is the best AIO I have owned. I am running an AMD Ryzen 7 5800X3D which are notoriously hot running cpu's. I was running in the high 80's sometimes pushing into the 90's duty after installing this beast I am clocking low 60's to mid 70's. It cools great! I installed it into a MSI MAG PANO 120R PZ Case. With a few modifications I did get it to fit. This thing is huge! It looks marvelous in my case and compliments my RGB scheme perfectly. The build quality is top tier. The added fan on the CPU block is a nice added feature to cool the surrounding area of the motherboard. The instructions are straight forward and easy to understand. It functions as advertised. PLEASE NOTE! Make insure your case can accept this size of radiator or you will be returning it. Well worth the money!!! ... show more
Reviewed in the United States on December 27, 2025 by Alan P.
    • high quality 420 aio high quality 420 aio
Review Image by Hunter L
Keeps my 9800x3d running at max performance with ease. the rgb is a nice touch. the fans are quiet. fit and finish wise its high quality. it’s been in my setup for 6mo no problems so far. if you can fit a 420 rad arctic makes it an easy decision, as the price is comparable to the 360.
Reviewed in the United States on May 28, 2026 Reviewed in the United States on May 28, 2026 by Hunter L
    • Loud, requires manual fan curves. Easy to install.
This thing is massive and it is thick too. I had to move my GPU out 1 slot, which is fine it is vertical mounted on a riser in a Thermaltake PS case. It is definitely loud so you will need to adjust your fan curves manually so it doesn't blow you out of the room. It cools great, so the standard fan curves are overkill for this thing anyway. At 60% max fan speed it out performs my old thinner 360 radiator at 100% fan speed. Make sure you set your fans to PWM. The colors of the fans are also much closer to the lighting on my Gigabyte RTX 5070 Ti OC Gaming card so it is aesthetically pleasing as well. The install instructions are digital, but if you have installed an AIO before, nothing new. It is pre-assembled for the most common air flow type (exhaust pushing), and you just need to screw it in from the back side, in my case required removing the back, so I had to take it off of the wall. It did come with a CPU mounting plate so that was happening anyways. The tube of MX-6 was a little thicker than the, as i found out, almost empty 8g tube of MX-6 i had on hand. i might upgrade this to MX-7 as the mount is easy to remove with just 2 screws attaching it to the afore mentioned CPU plate. Overall solid purchase for just over $100 and replace a $200 Thermaltake 360 RGB setup. (color was way off from the GPU fans so it was not aesthetically pleasing any more) ... show more
Reviewed in the United States on June 4, 2026 by Tsunami1
    • Absolutely Massive and Incredible AIO cooler! Absolutely Massive and Incredible AIO cooler!
Review Image by Taiki
First and foremost I'd say definitely measure your case, motherboard, and ram clearance before buying, this aio is pretty huge. For reference, the relevant parts in this build were a 9950x3D AMD CPU, G.Skill Trident Z5 64GB DDR5 RAM, ASUS ROG Strix x870E-E Gaming Motherboard, and the case is a HAVN HS 420. Installation was extremely straightforward, no issues with connectivity or functionality, the aio comes with separate headers or a combined one for your motherboard for lighting/fan/pump control. Temperatures are beyond incredible, I live in a warmer environment and cpu temps sit at 35c on idle, while reaching 70c max utilizing 32 threads on burst python parallelization functions, all of this while being completely whisper quiet. I do wanna note that there is no direct rgb software from arctic to my knowledge unless you buy their controller separately, but the rgb can be controlled through a number of other software, including in my case, the aura creator in armoury crate for ASUS. Also rather comical, but I thought it was worth mentioning for any others that didn't notice, the cpu block itself only has the appearance of a fan, but does not actually spin, not that it's needed haha. Overall it's a fantastic cooler and I'm very happy with my purchase! ... show more
Reviewed in the United States on November 11, 2025 Reviewed in the United States on November 11, 2025 by Taiki
    • Strong Thermals, Loud Fans – Worth It with a Few Tweaks”
Overall, this has been a great experience so far. The performance is solid, and it works well with my setup. That said, there are a few things to be aware of before buying. Installation isn’t exactly beginner-friendly. First, there are no printed instructions included in the box—you’ll need to scan a QR code to access the manual online. While the digital guide is clear enough, having a physical manual on hand would’ve made the process smoother. Additionally, the mounting process requires a fair amount of force. It’s not overly complicated, but aligning and securing everything does take some effort and patience. Definitely don’t rush the install. Fan noise can be noticeable under heavier loads. During gaming sessions with high or ultra settings—especially when paired with a high-performance CPU like the Ryzen 7 9800X3D—the fans spin up audibly to maintain cooling. That said, thermal performance is excellent, with CPU temperatures typically staying under 60°C, even during intense gameplay. If you prefer a quieter setup, you can adjust the fan curve or switch to a quiet mode, but expect temperatures to rise slightly—usually by around 5–7°C. Another option to consider down the line is upgrading to Noctua fans for improved acoustics without sacrificing cooling performance. It’s a worthwhile investment if noise levels are a concern for you. In summary, this cooler delivers strong thermal performance, especially for high-end CPUs, but comes with a few minor drawbacks: a more involved installation process, no printed manual, and fan noise under load. If you’re okay with those trade-offs—and possibly planning a fan upgrade in the future—it’s a solid choice that gets the job done well. ... show more
Reviewed in the United States on September 7, 2025 by Michelle
    • Definitely worth buying this 420mm AIO it is Freezer!!! Brrrr Definitely worth buying this 420mm AIO it is Freezer!!! Brrrr
Review Image by Muhammad Khurram
It turned out to be the best AIO Cooler I have used in a while. It has big 3 140mm fans that push all the heat out without being noisy! Yes bigger fans less noise as they push more air out running at LOW RPM. My Ryzen 9900x runs at 30-33C on idle and about 60-65C in load conditions, pretty good numbers at the price is unreal, i was going with NZXT and all those big brand selling their products at so high price but I bought recently NZXT H9 Flow RGB+ 2025 model and wanted to try this budget friendly liquid cooler. I realize I am first to order this on amazon and it was great same day delivery. I moved from NZXT X63 and Noctua D15 on another PC. I am definitely buying Arctic products more to try as this brand has surprised me with this cooler. With other brands good luck finding 3 fans and radiator of this humungous size. It doesn’t only cool well, it comes with RGB and amazing VRM fan that attaches so easily to heatsink area on top of your processor. And that offset for AMD is mind blowing, no need for an offset bracket, this is designed best for at least AMD as core units are lower on these AM5 processors. Great job Arctic for making this affordable! Amazon great job at same day delivery as I wanted to do this on weekend. Overall highly satisfied with its performance. ... show more
Reviewed in the United States on July 13, 2025 Reviewed in the United States on July 13, 2025 by Muhammad Khurram
    • Excellent Thermal Performance in a High-End Overclocked Workstation
I’ve been extremely impressed with ARCTIC Liquid Freezer III Pro 420 A-RGB - AIO CPU Cooler and how well it performs in my high-end workstation system. From initial installation through sustained heavy workloads, it has delivered excellent thermal stability while providing an added margin of safety that was important for my configuration. With Kryonaut Extreme applied to the AIO CPU liquid cooling spreader: • AIO CPU liquid cooling is at low • Idle CPU temperatures average ~30 °C • Peak temperatures remain under 50 °C, even under sustained full load • Workloads include CAD and 3D content creation tools such as Blender and Maya • The CPU is overclocked, yet remains thermally stable during long modeling and rendering sessions For an overclocked workstation class processor, these thermals are exceptional and speak directly to the effectiveness of AIO cooler combined with the thermal paste in real, demanding use — not just synthetic benchmarks. For my work system, reliability and safety were non-negotiable. Kryonaut Extreme delivers performance without the risks, making it the correct choice for this configuration. My Workstation Configuration: • CPU: AMD Ryzen 9 9950X (Zen 5, 16-Core) • Cooling: ARCTIC Liquid Freezer III Pro 420 A-RGB • GPU: ASUS TUF Gaming RTX 5080 O16G • Motherboard: ASUS ROG Crosshair X870E Hero (AM5) • Memory: Corsair Vengeance RGB DDR5-6000 CL30 (64GB, 2×32GB) • Storage: Samsung 9100 PRO 2TB PCIe 5.0 (OS Drive) , WD Black SN850X 4TB (Project Drive), Samsung 9100 PRO 2TB PCIe 5.0 (Scratch Drive) • Display: Alienware AW3225QF 4K 240 Hz • Power Protection: APC Back-UPS Pro BR1500MS2 • Power Supply: Super Flower Leadex VII Platinum PRO 1200W (ATX 3.1) • Primary Workloads: Blender, Maya, CAD design, rendering, and visualization • Operating Mode: Overclocked, sustained professional workloads ... show more
Reviewed in the United States on December 12, 2025 by Francisco Velez
    • Not Compatible. Not Compatible.
Review Image by Derick
This is probably one of the best coolers on the market but it is NOT compatible with the new ASUS X870E-E Strix NEO Wifi 7. The heatsink for the M.2 interferes with the bottom of the mount for the cooler.
Reviewed in the United States on May 29, 2026 Reviewed in the United States on May 29, 2026 by Derick

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