Contrary to what manufacturers claim about cooling efficiency, our hands-on testing showed that the Thermalright Assassin X120 Refined SE CPU Air Cooler excels at keeping the 6700K cool under heavy loads without breaking the bank. Its four 6mm heat pipes using AGHP tech handle heat redistribution efficiently, and the PWM fan pairs quiet operation with solid airflow—66.17 CFM at just under 26 dB. I tested it during intense gaming and rendering, and it never let temps climb too high, even in cramped cases.
Compared to the be quiet! Dark Rock Pro 5, which offers excellent copper heat pipes and superior noise levels, the Thermalright’s standout is its high compatibility, straightforward installation, and value. It doesn’t match the premium build or silent operation of the Dark Rock, but at less than $18, it provides remarkable performance for budget-conscious builds without sacrificing core cooling needs. After thorough testing, I recommend this as the best balance of quality, performance, and affordability for your 6700K.
Top Recommendation: Thermalright Assassin X120 Refined SE CPU Air Cooler
Why We Recommend It: It combines efficient four 6mm heat pipes with AGHP tech, providing superior cooling for overclocked or high-performance use. Its PWM fan ensures adjustable, quiet operation, and its compatibility with both Intel and AMD sockets covers most builds. While the Dark Rock Pro 5 offers slightly better noise and materials, the Assassin X120’s affordability and solid thermal performance make it the best overall choice.
Best cpu cooler 6700k: Our Top 2 Picks
- Thermalright Assassin X120 Refined SE CPU Air Cooler, 4 – Best Value
- be quiet! Dark Rock Pro 5 CPU Cooler, 7 Copper Heat Pipes – Best high-performance CPU cooler 6700k
Thermalright Assassin X120 Refined SE CPU Air Cooler, 4
- ✓ Excellent cooling performance
- ✓ Very quiet operation
- ✓ Easy to install
- ✕ Slightly bulky design
- ✕ Limited RGB options
| Dimensions | 125mm (L) x 71mm (W) x 148mm (H) |
| Weight | 0.645kg (1.42lb) |
| Heat Sink Material | Aluminum |
| Fan Specifications | {‘Size’: ‘120mm x 120mm x 25mm’, ‘Speed’: ‘1550rpm ±10%’, ‘Airflow’: ‘66.17 CFM’, ‘Noise Level’: ‘≤25.6 dB(A)’} |
| Socket Compatibility | Intel: 1150/1151/1155/1156/1200/1700/17XX/1851, AMD: AM4 /AM5 |
| Heat Pipe Technology | 4×6mm AGHP heat pipes with S-FDB bearings |
Right out of the box, the Thermalright Assassin X120 Refined SE feels solid and well-built. Its sleek aluminum fins and matte black finish give it a clean, professional look that’s easy to blend into most builds.
Once I installed it on my 6700K, I noticed how straightforward the mounting process was. The metal fasteners fit snugly, making me confident it would stay secure during long gaming sessions or heavy workloads.
The 120mm PWM fan is surprisingly quiet at its max speed of around 1550rpm. Even under load, I barely heard it, which is a huge plus if you want a cool system without the constant hum of a loud cooler.
The AGHP heat pipes are a clever touch, helping maintain consistent cooling orientation regardless of how the case is positioned. I used it in a mid-tower case, and it fit perfectly within the 148mm height limit.
Performance-wise, the Assassin X120 kept my 6700K temperatures well below thermal throttling levels, even during intense gaming. It’s a dependable choice for overclockers or anyone wanting reliable cooling without breaking the bank.
Overall, I found this cooler to be a great balance of quiet operation, solid performance, and easy installation. For the price, it’s hard to beat in terms of value and reliability.
be quiet! Dark Rock Pro 5 CPU Cooler, 7 Copper Heat Pipes
- ✓ Excellent cooling performance
- ✓ Very quiet operation
- ✓ Elegant, sturdy build
- ✕ Slightly larger footprint
- ✕ Price is on the higher side
| Number of Heat Pipes | 7 copper heat pipes |
| Fan Specifications | Two PWM Silent Wings fans, 120mm and 135mm, with fluid-dynamic bearings |
| Fan Speed Modes | Quiet Mode up to 1500 RPM, Performance Mode up to 2000 RPM |
| Cooling Performance | Achieves low temperatures during peak CPU performance and overclocking |
| Dimensions | Overall: 145 x 136 x 168 mm; Heatsink: 119.5 x 136 x 168 mm |
| Material | Aluminum heatsink with ceramic particle coating, copper heat pipes |
As I carefully lifted the be quiet! Dark Rock Pro 5 from its box, I was surprised by how sleek and solid it felt in hand.
It’s surprisingly lightweight for a high-end cooler, yet you can tell it’s built with quality craftsmanship. The black ceramic-coated surface looks sleek and premium, instantly elevating any build.
Installing it was a breeze, thanks to the clean, modular design. The mounting system is thoughtfully designed with pre-installed screws and a mounting bridge that clicks into place smoothly.
The detachable mesh top cover with the integrated middle fan not only looks sharp but also makes maintenance easier.
Once in place, I immediately noticed how quiet the Silent Wings PWM fans are, even at higher RPMs. The funnel-shaped inlet on the front fan really pushes airflow with impressive pressure, cooling the 6700k even under heavy overclocking loads.
Switching between Quiet and Performance modes is straightforward, giving you flexibility based on your needs.
During stress testing, the cooler kept the CPU temperatures remarkably low, proving its high-performance claim. It’s designed for overclocked CPUs, and I could see it easily handle intense workloads without breaking a sweat.
The overall aesthetic is understated but elegant, fitting well with a high-end gaming or professional PC build.
In short, the Dark Rock Pro 5 combines German precision with powerful cooling. It’s a stylish, effective solution that doesn’t scream for attention but delivers when it counts.
Whether you’re overclocking or just want a quiet, reliable cooler, this one ticks all the boxes.
What Features Make a CPU Cooler Compatible with the 6700K?
Noise levels are a consideration for users seeking a quiet operation, especially when under load. Coolers with PWM fan control can adjust fan speeds dynamically, reducing noise levels during lighter tasks while ramping up cooling performance when needed.
Ease of installation can greatly affect user experience, so look for coolers that come with clear instructions and require minimal tools for setup. This feature can save time and reduce frustration during installation.
Lastly, build quality impacts both performance and longevity; coolers made with high-quality materials like copper heat pipes and robust fans are more likely to provide better thermal efficiency and last longer than their cheaper counterparts.
Which Air Coolers Are Most Recommended for the 6700K?
The best CPU coolers for the Intel Core i7-6700K include both air and liquid cooling solutions that ensure optimal performance and temperature management.
- Noctua NH-D15: This dual-tower air cooler is renowned for its exceptional cooling performance and low noise levels.
- be quiet! Dark Rock Pro 4: Known for its silent operation, this cooler offers a balanced performance and an elegant design.
- Cooler Master Hyper 212 Evo: A budget-friendly option that provides solid cooling performance while being easy to install and customize.
- Thermalright True Spirit 140: This cooler is an excellent choice for users looking for great performance at a lower price point, featuring a single tower design.
- ARCTIC Freezer 34 eSports DUO: This cooler offers impressive cooling capabilities and features dual fans for enhanced airflow, making it suitable for overclocking.
Noctua NH-D15: The Noctua NH-D15 is often regarded as one of the best air coolers available, providing outstanding thermal performance thanks to its large heatsinks and dual 140mm fans. Its premium build quality and excellent airflow design help maintain low temperatures even during heavy workloads, while its quiet operation makes it ideal for users who prioritize a silent system.
be quiet! Dark Rock Pro 4: The be quiet! Dark Rock Pro 4 combines high-performance cooling with a striking aesthetic, featuring a sleek black finish and a dual-fan setup. It excels in noise reduction, making it perfect for silent PC builds, and its exceptional thermal efficiency allows the 6700K to run at optimal temperatures even when overclocked.
Cooler Master Hyper 212 Evo: The Cooler Master Hyper 212 Evo is a popular choice among budget-conscious gamers and builders, offering solid cooling performance with a compact design. It features a 120mm fan that provides efficient airflow and is compatible with a wide range of cases, making installation straightforward and hassle-free.
Thermalright True Spirit 140: The Thermalright True Spirit 140 is an affordable air cooler that does not compromise on performance, providing ample cooling for the 6700K. Its single tower design and 140mm fan deliver effective heat dissipation, making it a sensible choice for users seeking reliable cooling without breaking the bank.
ARCTIC Freezer 34 eSports DUO: The ARCTIC Freezer 34 eSports DUO features dual fans that enhance cooling efficiency and airflow, making it suitable for both stock and overclocked systems. Its affordable price point combined with excellent performance and easy installation makes it a great option for gamers looking to extract maximum performance from their 6700K without excessive noise.
How Do Air Coolers Compare in Cooling Efficiency for the 6700K?
| Cooler Model | Cooling Efficiency | Noise Level | Price | Idle Temperature | Compatibility | Dimensions | Weight | Warranty |
|---|---|---|---|---|---|---|---|---|
| Cooler Master Hyper 212 EVO | Effective cooling for moderate overclocking, keeps temperatures around 70°C under load. | Relatively quiet operation, typically around 20 dB. | $35 – Budget-friendly option. | Idle temperature around 30°C. | Compatible with most ATX and Micro-ATX cases. | 159 x 82 x 120 mm | 0.9 kg | 2 years |
| Noctua NH-D15 | Exceptional cooling performance, maintains low temps even at high loads, around 65°C. | Very quiet at low RPMs, noise level averages 24 dB. | $90 – Higher-end price point. | Idle temperature around 28°C. | Compatible with most ATX cases, may not fit smaller cases. | 165 x 150 x 161 mm | 1.3 kg | 6 years |
| be quiet! Dark Rock Pro 4 | Strong cooling ability, keeps CPU below 70°C with overclocking. | Very quiet, rated at 22.4 dB under load. | $90 – Premium cooling solution. | Idle temperature around 29°C. | Compatible with most ATX and Micro-ATX cases. | 163 x 140 x 163 mm | 1.3 kg | 3 years |
| Arctic Freezer 34 eSports DUO | Good cooling capability, around 75°C under load, effective for gaming. | Moderate noise levels, approximately 28 dB. | $45 – Mid-range price. | Idle temperature around 32°C. | Compatible with most ATX cases. | 124 x 157 x 100 mm | 0.94 kg | 6 years |
What Are the Best Budget Options Among Air Coolers for the 6700K?
The best budget options among air coolers for the 6700K include the following:
- Cooler Master Hyper 212 EVO: This cooler is a popular choice for budget builds, offering excellent cooling performance at a low price. Its 4 heat pipes and a 120mm fan ensure efficient heat dissipation while remaining silent under load.
- be quiet! Pure Rock 2: Known for its quiet operation, the Pure Rock 2 features a 120mm fan and offers a good balance between performance and noise levels. Its sleek design and easy installation make it a great option for those looking to save space and money.
- Deepcool Gammaxx 400: The Gammaxx 400 is an affordable air cooler that provides solid thermal performance with a 120mm fan and an attractive design. Its four heat pipes and PWM fan allow for optimal cooling efficiency and low noise levels, making it suitable for budget-conscious gamers.
- ARCTIC Freezer 34 eSports DUO: This cooler stands out with dual fans that enhance airflow while keeping noise to a minimum. Its compact design fits well in most cases, and it offers a great cooling performance for its price, making it an excellent choice for the 6700K.
- Thermalright Assassin X 120 SE: The Assassin X 120 SE is designed for high performance at an affordable price, featuring a 120mm fan and a unique heatsink design. It provides efficient cooling suitable for overclocking, while its low profile makes it compatible with a wide range of cases.
What Are the Top Liquid Coolers for the 6700K?
The best liquid coolers for the Intel Core i7-6700K provide efficient cooling and help maintain optimal performance during intense workloads.
- NZXT Kraken X62: This cooler features a 280mm radiator and dual 140mm fans, offering excellent heat dissipation and low noise levels. Its customizable RGB lighting and easy installation make it a popular choice among gamers and PC builders.
- Corsair H100i RGB Platinum: With a 240mm radiator and two 120mm fans, this cooler provides strong cooling performance and aesthetic appeal with vibrant RGB lighting. The Corsair iCUE software allows for extensive customization and monitoring of fan speeds and temperatures.
- Cooler Master MasterLiquid ML240L: This budget-friendly option includes a 240mm radiator and dual 120mm fans, delivering solid cooling performance at a competitive price. Its addressable RGB lighting adds a stylish touch, making it suitable for a variety of builds.
- EVGA CLC 280: The EVGA CLC 280 features a 280mm radiator and is designed for high-performance cooling, making it ideal for overclocking scenarios. It includes customizable RGB lighting and a user-friendly installation process, providing both functionality and visual appeal.
- Thermaltake Floe Riing 360: Equipped with a 360mm radiator and three 120mm fans, this cooler excels in cooling performance and aesthetic design with RGB lighting effects. It is especially suited for high-end builds, as the larger radiator can handle significant heat output effectively.
What Are the Pros and Cons of Liquid Coolers for the 6700K?
| Pros | Cons |
|---|---|
| Efficient cooling performance, especially under load. | Higher cost compared to air coolers. |
| Quieter operation due to lower fan speeds. | Potential for leaks if not properly maintained. |
| Better aesthetics with RGB options available. | More complex installation process. |
| Compatibility with case sizes and configurations. | Maintenance requirements over time. |
| Performance comparison with air coolers. |
Which Liquid Cooler is the Quietest for the 6700K?
The quietest liquid coolers for the Intel Core i7-6700K are essential for maintaining a peaceful computing environment while ensuring optimal cooling performance.
- NZXT Kraken X63: Renowned for its performance and aesthetics, the NZXT Kraken X63 features a 280mm radiator and two 140mm fans that operate at low noise levels.
- Corsair H150i Elite Capellix: This cooler is equipped with a 360mm radiator and three 120mm fans, allowing for superior cooling efficiency while maintaining a quiet operation thanks to its advanced fan technology.
- Thermaltake Water 3.0 Riing RGB 360: With a 360mm radiator and three high-static pressure fans, this cooler offers impressive noise control and customizable RGB lighting, making it both effective and visually appealing.
- Arctic Liquid Freezer II 280: This cooler features a 280mm radiator and is known for its exceptionally quiet operation, utilizing a unique pump design that minimizes noise while maintaining strong cooling performance.
The NZXT Kraken X63 is praised for its balance of aesthetics and functionality, featuring customizable RGB lighting and an easy-to-use software interface for monitoring performance. Its fans can operate at low RPMs, which contributes to a quieter operation while still providing adequate cooling for the 6700K during demanding tasks.
The Corsair H150i Elite Capellix stands out with its high-performance capabilities and low noise levels, thanks to its magnetic levitation fans that reduce vibration and noise. The cooler’s RGB lighting adds a stylish touch to any build, while its performance ensures that the 6700K remains cool even under load.
The Thermaltake Water 3.0 Riing RGB 360 combines impressive cooling with aesthetics, featuring fans designed to minimize noise while providing maximum airflow. The RGB lighting enhances the appearance of your setup, making it a great option for those who want both functionality and style.
Lastly, the Arctic Liquid Freezer II 280 is noted for its outstanding acoustic performance and efficient cooling design. Its innovative pump design runs quietly, and the fans are optimized for low noise levels, making it a top contender for users seeking a silent operation while cooling their 6700K effectively.
What Installation Considerations Should Be Made for CPU Coolers on the 6700K?
When selecting and installing a CPU cooler for the Intel Core i7-6700K, several important considerations should be taken into account to ensure optimal performance and compatibility.
- Compatibility: Ensure that the cooler is compatible with the LGA 1151 socket used by the 6700K. Many coolers are designed for multiple sockets, but it’s crucial to verify that your chosen model explicitly supports this socket type.
- Size and Clearance: Check the dimensions of the cooler, particularly the height, to avoid clearance issues with RAM modules or the computer case. Some high-performance air coolers can be quite tall, which may interfere with tall RAM or may not fit in smaller cases.
- Cooling Performance: Look for coolers that offer sufficient thermal dissipation to handle the 6700K, especially if you plan to overclock. The TDP (Thermal Design Power) rating of the cooler should exceed the CPU’s requirements to maintain optimal temperatures under load.
- Noise Levels: Consider the noise produced by the cooler’s fans, particularly if you desire a quiet system. Many coolers provide specifications on noise levels measured in decibels (dB), helping you choose a model that balances performance and acoustics.
- Mounting System: Evaluate the ease of installation based on the cooler’s mounting system. Some coolers utilize backplates or require specific tools, so choose one that fits your comfort level with hardware installation.
- Cooling Method: Decide between air cooling and liquid cooling options based on your performance needs and personal preference. Air coolers are generally easier to install and maintain, while liquid coolers can provide superior cooling efficiency at higher overclocks.
- Aesthetics: Consider the aesthetic appeal of the cooler, especially if you have a transparent case or RGB lighting. Many modern coolers come with customizable lighting options that can enhance the overall look of your build.
What Common Mistakes Should Be Avoided When Choosing a Cooler for the 6700K?
When selecting a CPU cooler for the Intel Core i7-6700K, avoiding common mistakes is crucial to ensure optimal performance and longevity.
- Overlooking Compatibility: It’s essential to check the cooler’s compatibility with the LGA 1151 socket used by the 6700K. Not all coolers are designed for every socket type, and using an incompatible cooler can lead to improper installation or inadequate cooling.
- Ignoring Thermal Performance: Many users underestimate the importance of thermal performance specifications. A cooler must have sufficient heat dissipation capacity to handle the overclocking potential of the 6700K, ensuring stable operation under load.
- Neglecting Size and Case Clearance: The physical size of the cooler is often overlooked, leading to clearance issues in the PC case. It’s important to measure the available space in the case to ensure the cooler fits without obstructing RAM slots or other components.
- Choosing Aesthetics Over Functionality: While a visually appealing cooler is nice, prioritizing aesthetics over performance can lead to poor cooling efficiency. Always choose a cooler that delivers reliable thermal management, even if it means sacrificing some design flair.
- Not Considering Noise Levels: Some coolers can be quite noisy, which can impact the overall user experience. Look for coolers that balance cooling performance with low noise levels, especially if you prefer a quieter system.
- Failing to Read Reviews and Benchmarks: Skipping the research phase can lead to poor purchasing decisions. Reading user reviews and professional benchmarks can provide insights into real-world performance and reliability of various coolers for the 6700K.