Are you looking to take your PC‘s cooling performance to the next level? 240mm all-in-one (AIO) liquid coolers provide an excellent balance of thermal management and easy installation compared to air coolers or custom water cooling loops. By combining the pump, radiator, fans and coolant into a pre-assembled, closed-loop package, 240mm AIOs make liquid cooling more accessible and convenient than ever for keeping your CPU temperatures in check during intense gaming or heavy workloads.
But with so many great options on the market, which 240mm AIO should you choose? In this comprehensive guide, we‘ll break down the best 240mm AIO coolers available in 2024 based on our expert analysis and testing. Whether you‘re looking for the best overall performance, coolest RGB lighting, smartest fan controls, or just the best value, we‘ve got you covered. We‘ll also walk you through everything you need to know when shopping for a 240mm AIO and share our tips for getting the most out of these impressive cooling solutions.
Our Top Picks
Best Overall: Corsair H100i Elite LCD
The H100i Elite LCD takes the crown as the best overall 240mm AIO in our opinion. It combines an upgraded pump design, excellent cooling performance, a vivid LCD screen, and some seriously cool RGB customization options. The big highlight is the 2.1" LCD on the pump head that can display system monitoring info, animated GIFs, or custom images and text. In our testing, the H100i Elite kept our Intel Core i7-13700K exceptionally cool even when overclocked.
The 120mm ML RGB fans strike a nice balance between quiet operation and strong airflow. Installation is relatively easy and you get a quality mounting kit supporting the latest Intel and AMD socket types. iCUE software integration allows extensive control over fan speeds, screen customization, and syncing the RGB across your other Corsair gear. While not cheap, the H100i Elite LCD is worth the premium for its combination of top notch cooling and style.
Pros:
- Excellent cooling performance
- Customizable LCD screen
- Quiet ML RGB fans
- Broad Intel and AMD support
Cons:
- Expensive
- iCUE software can be finicky
Best LCD Screen: MSI MEG CORELIQUID S360
If you want your AIO to double as an information and customization hub, the MSI MEG CORELIQUID S360 is hard to beat. The star of the show is the large 3.5" LCD panel integrated into the pump. Navigate through the crisp, full-color menus using the nifty joystick control to monitor temperatures, frequencies, fan speeds and more. You can also showcase images, animated GIFs, or mesmerizing visuals that react to your system‘s audio.
Looks aside, the CORELIQUID is no slouch in the cooling department. The 360mm radiator paired with MSI‘s TORX FAN 4.0 design provides ample surface area and focused airflow for taming even the spiciest of CPUs. Like most AIOs, installation could be a bit easier, but MSI includes mounting hardware for all modern desktop sockets. The price of this much screen real estate and cooling prowess is steep, but it‘s currently in a league of its own.
Pros:
- Large, vibrant 3.5" LCD screen
- Impressive cooling capacity with 360mm radiator
- TORX FAN 4.0 design optimizes airflow
Cons:
- Very expensive
- Challenging installation process
Best RGB: Lian Li Galahad AIO 240 RGB
Lian Li is renowned for its stylish yet functional designs and the Galahad 240 RGB is a shining example. The star attraction is the gorgeous RGB lighting on both the fans and pump head. You get two 120mm fans equipped with 16 addressable RGB LEDs each, illuminating the fan blades and outer rims. The pump features a transparent water block lit by 36 mini LEDs.
But the Galahad isn‘t just a pretty face – it delivers excellent cooling results and quiet acoustics thanks to the high static pressure fans and 240mm radiator. With the sleeved tubing and gleaming aluminum parts, build quality is top notch as well. Setup is fairly painless using the universal mounting kit. Our main gripe is that you‘ll need a separate controller or compatible motherboard to fully customize the lighting. Those wanting maximum RGB with solid cooling and clean aesthetics will find the Galahad AIO 240 a compelling choice.
Pros:
- Beautiful, diffused RGB lighting
- Very quiet operation
- Excellent build quality
Cons:
- Limited lighting customization out of the box
- Pricier than some competitors
Best Dual Chamber Pump: Asus ROG Ryujin II 240
Asus designed the ROG Ryujin II 240 for one purpose – to be the most uncompromising 240mm AIO on the market for hardcore enthusiasts and overclockers. It starts with the pump featuring Asetek‘s latest 7th gen design with a dual-chamber layout. This improves hydraulic performance and heat transfer efficiency compared to single chamber pumps.
The Ryujin II also packs a large copper plate for better heat dissipation, paired with reinforced sleeved tubing. The 240mm radiator uses extra thick fins to maximize surface area. In testing, this translates to exceptional cooling results, even when overclocked under heavy loads. The Noctua IndustrialPPC 2000 PWM fans are some of the best in the business in terms of airflow and durability. While noise levels are on the high side at full speeds, you can fine tune curves using Asus‘ intuitive FanXpert software. Other niceties include embedded fan headers and Aura Sync compatible lighting on the pump. If peak performance is your top priority, the ROG Ryujin II is tough to top.
Pros:
- Exceptional cooling performance, even when overclocked
- Advanced Asetek 7th gen pump with dual chambers
- Premium build quality and packaging
Cons:
- Noisy at high fan speeds
- Most expensive 240mm AIO
Best Budget: Cooler Master MasterLiquid ML240L RGB V2
You don‘t have to spend a fortune to get your feet wet with 240mm liquid cooling. The Cooler Master MasterLiquid ML240L RGB V2 offers solid performance and ARGB flair that belies its affordable price. The pump sports a compact, rounded design accented by a ring of addressable RGB LEDs.
Two SickleFlow 120 fans provide decent airflow and feature a translucent frame lit by ARGB LEDs. Thanks to the 240mm radiator and 3rd gen dual chamber pump, the ML240L kept temps under control in our testing, even with a bit of overclocking. However, noise levels were noticeably higher than pricier coolers. Installation is beginner-friendly, with a universal mounting kit supporting most Intel and AMD sockets. While you‘ll have to control the lighting through your motherboard or buy a separate controller, the ML240L RGB V2 delivers good value for gamers and enthusiasts on a budget.
Pros:
- Very affordable for a 240mm AIO
- Decent cooling performance
- ARGB lighting on fans and pump
Cons:
- Louder than more expensive coolers
- No included RGB controller
How to Choose the Best 240mm AIO Cooler for You
A 240mm AIO can be an excellent cooling upgrade for your gaming rig or workstation, but there are a number of factors to consider when choosing the right one for your needs:
Compatibility
First and foremost, verify that the AIO supports your CPU socket type. Most coolers are compatible with mainstream Intel and AMD desktop sockets, but double check the specs to ensure your exact processor is supported. You‘ll also want to make sure you have room in your case for a 240mm radiator, which is usually mounted at the top or front.
Cooling Performance
If you‘ll be running your CPU at stock speeds, most 240mm AIOs will have no problem keeping temps in check. However, if you plan on overclocking, look for a model with a beefier pump, thicker radiator, or higher speed fans to maximize heat dissipation. Be prepared for higher noise levels, though.
Noise
The main sources of noise in an AIO are the pump and fans. Look for coolers with a quality pump known for quiet operation. Pay attention to the included fans – higher RPMs mean better cooling but more noise. Picking a cooler with PWM fans will let you adjust speeds based on your preference for noise vs cooling.
Lighting and Aesthetics
Since the pump block and fans are visible in your build, their appearance is important too. If you want a cleaner look, choose an AIO with neutral colors and minimal lighting. To really make your rig pop, pick a cooler with RGB fans and a pump block that complements your overall build.
Software and Controls
Check what software is used to control the cooler‘s RGB and fan speeds. Coolers from mobo manufacturers like Asus and Gigabyte can usually be managed through their respective programs. Others like Corsair and NZXT have their own software suites. The quality and features of these programs vary, so do your research.
Price and Warranty
240mm AIOs range from under $100 to over $200 for flagship models with premium features. Don‘t feel obligated to spend top dollar, but don‘t cheap out either – your CPU is counting on reliable cooling. Also consider warranty length and terms since AIO pumps can fail prematurely.
What to Know Before Buying a 240mm AIO Cooler
While 240mm AIOs may seem like a plug-and-play cooling solution, there are a few things to be aware of before taking the plunge:
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Radiator orientation matters. Typically you‘ll want the radiator mounted with the tubes at the bottom to prevent air bubbles from entering the pump and causing noise or premature wear. Consult your case and cooler manuals for optimal configuration.
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Don‘t forget the thermal paste! Most AIOs come with thermal compound pre-applied or in a syringe. If you‘re reusing the cooler on a different CPU, be sure to thoroughly clean off the old paste and apply a fresh layer. Using high quality paste can shave a couple degrees off your temps too.
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You may need to update your firmware. Many coolers rely on firmware to control lighting and fan speeds. Before installing, check for any firmware updates that may improve functionality or compatibility with the latest hardware and software.
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Prep for pump failure. AIO pumps are the most likely point of failure in the system. Inspect the unit for any signs of leakage before installing, and keep an eye out for rising temps that may indicate a failing pump. Have a backup air cooler handy in case of emergency.
The AIO Experience
So is a 240mm AIO cooler really worth it? For many PC enthusiasts, the answer is a resounding yes. Compared to bulky air coolers, a 240mm AIO provides superior cooling performance in a more compact package. This not only improves CPU thermals, but also frees up valuable space around the socket area for beefier VRM heatsinks, taller RAM modules, or cable routing.
If you‘re pursuing a quieter build, an AIO can help by relocating the fans to the radiator at the edge of the case, away from the noise-sensitive CPU area. Many mid-range and higher AIOs also use higher quality pumps and fans than budget coolers, striking a better balance between noise and performance.
240mm AIOs also earn major style points with their sleek symmetrical layouts, braided tubing, and lighting options ranging from subtle to stupendous. Being able to see the coolant flow and customize the RGB makes your PC feel like a living, breathing machine.
Installation may seem daunting for first-timers, but most 240mm AIOs are very beginner-friendly with clear instructions and compatibility with all major sockets out of the box. Once set up, maintenance is minimal beyond dusting the radiator fins and fans occasionally. With their ease-of-use and strong performance, it‘s no wonder 240mm AIOs have become the go-to choice for many passionate PC builders.
Frequently Asked Questions
How long do AIO coolers last?
Most AIOs have a lifespan of 5-7 years. The pump is usually the first component to fail, while the fans may last longer. Some AIOs come with 5 year or longer warranties that cover the whole unit.
Can you refill an AIO cooler?
Most AIOs are sealed and not designed to be user-serviceable. The coolant should last the life of the unit. Attempting to open the loop will likely void your warranty. Only do so if you absolutely know what you‘re doing.
How often should I clean my AIO?
Dust buildup on the radiator and fans can impact performance over time. Every 6-12 months, power down your system and use compressed air to clear any debris. Avoid using liquid cleaners on the pump block or connectors.
Is a 240mm AIO enough for overclocking?
A quality 240mm AIO can handle modest overclocks on most mainstream CPUs with headroom to spare. However, if you‘re really pushing your chip with high voltages, exotic cooling like a custom loop may be necessary to manage the heat output.
Why is my AIO making strange noises?
Gurgling or sloshing sounds usually indicate that an air bubble has entered the pump. Try remounting the radiator with the tubes at the bottom. Grinding or rattling noises can mean the pump bearings are failing, in which case you‘ll need to replace the unit.
Conclusion
240mm AIO coolers offer an enticing blend of performance, style, and convenience for PC enthusiasts of all stripes. Whether you‘re looking to overclock your gaming rig, reduce system noise, or add some custom liquid flair to your build, there‘s a 240mm AIO out there to meet your needs and budget.
The models highlighted in this guide represent some of the best 240mm AIO options we‘ve tested, from monster overclockers to understated performers to gorgeous RGB showcases. By carefully considering your priorities and compatibility, you‘ll be able to select the ideal 240mm AIO to help your PC stay cool under pressure. With the right AIO and a bit of TLC, you can enjoy years of ultra-cool performance and style.