Pay in installments of $18.75 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 29 - Sep 3
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Be Quiet! BK021 Dark Rock 4 Heatsink & Fan, Intel & AMD Sockets, Silent Wings Fan, Fluid Dynamic, 200W TDPDark Rock 4 offers an extreme cooling performance of 200W TDP and virtually inaudible operation. Perfect for overclocked systems and demanding workstations. Virtually inaudible Silent Wings 135mm PWM fan Achieves only 21. 4dB(A) at maximum fan speed Six high performance copper heat pipes Airflow optimized, wave contoured cooling fins Easily installable black installation kit can be mounted from above Supports an additional 120mm fan; clips are
Dark Rock 4 offers an extreme cooling performance of 200W TDP and virtually inaudible operation. Perfect for overclocked systems and demanding workstations.
- Virtually inaudible Silent Wings 135mm PWM fan
- Achieves only 21.4dB(A) at maximum fan speed
- Six high-performance copper heat pipes
- Airflow-optimized, wave-contoured cooling fins
- Easily installable black installation kit can be mounted from above
- Supports an additional 120mm fan; clips are included in scope of delivery
- Brushed aluminum top cover with diamond cut finish
- 3-year manufacturer’s warranty
- German product conception, design and quality control
Virtually Inaudible Operation
Even at 100% PWM fan speed noise is an insignificant 21.4dB(A)
The Silent Wings 135mm PWM fan features nine airflow-optimized fan blades, a six-pole motor for less vibration and a durable fluid-dynamic bearing. Decoupled fan mounting with vibration-isolating elements on the heat sink.
Extreme Cooling Power
Achieving an incredible performance-to-noise ratio
No compromise in silence and performance for overclocked systems and demanding graphics applications! Dark Rock 4 provides an impressive rating of 200W TDP and achieves low temperatures even during periods of peak CPU performance.
Highly Advanced Design
The core features that result in high-end cooling
Dark Rock 4 is equipped with six advanced technology 6mm copper heat pipes that maximize the heat conductance. Airflow-optimized, wave-contoured cooling fins with small dots on their surfaces increase the air circulation. The special black coating with ceramic particles makes a perfect transfer of heat possible.
Single-Tower Layout
Powerful cooling for your components
The compact single-tower design achieves excellent heat dissipation in small spaces. One fan is pre-installed. It is also possible to add another 120mm fan for even better cooling.
User-Friendly Elegance
Stylish and easy to install
The mounting kit for the Dark Rock 4 cooler is completely black, perfectly matching the black design of the cooler itself. You can conveniently install the cooler on the motherboard from above. The brushed aluminum top cover with its diamond cut finish adds a touch of elegance to this high-end cooler.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 11 reviews
Sort
Product Reviews
★★★★★ 5
I like the mildly tart taste of this unflavored, unsweetened drink made up with water.
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I like the mildly tart taste of this unflavored, unsweetened drink made up with water. The texture doesn't bother me, with stirring right from the beginning of adding the water, there is no clumping. After 10 days there is no effect on my bowels which were regular previously anyway. My doctor wanted me to use this although I already have a high fiber diet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
★★★★★ 1
Definitely Not Unflavored. This is Tart / Sour, Which Limits the Options to Certain Juices
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I was expecting an unflavored fiber powder. However, expect a sour/tart taste. This means you can't add it to tea or coffee. I don't think it is appropriate to say that it is "unflavored" as I've had psyllium husk from other vendors that are truly "unflavored" (i.e. no citric acid). Dextrin (another fiber source) is also unflavored. But this Metamucil is tart (like sucking a lime) and can only be added to tart juices like orange juice or lemonade.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
Happy it is unflavored
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I was worried about the taste based on some of the reviews. I tried it in my coffee, and I'm glad I did it that way. I keep coffee in the fridge, so that is what I mixed with one tablespoon of this. I use half and half and no sugar. I tasted it. It tastes like burnt coffee. Not a bad thing...thats just what the taste it added. I decided to see what would happen if I added a splash of a flavored creamer. The taste went away instantly. Hope this helps someone!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
★★★★★ 5
Effective Daily Fiber Supplement with Noticeable Digestive Benefits
Size: 2.32 Pound (Pack of 1), Style: New
I am very pleased with the Metamucil Premium Blend 4-in-1 Fiber Supplement. Shipping was prompt, and the container arrived well-packaged and sealed securely. There were no issues with leakage or damage, and it was ready to use right away. In terms of product quality, this fiber supplement performs exactly as expected. It’s made with psyllium husk fiber, which is known for supporting digestive health by helping trap and remove waste while promoting regularity. The powder mixes fairly well with water and has a smoother consistency than some other fiber products I’ve used. The orange flavor is mild and easy to drink, especially when mixed thoroughly and consumed right away. I noticed that with consistent use, it helped improve digestion and left me feeling lighter overall. The added benefit of prebiotic fiber support is also a plus, contributing to gut health over time. From a value standpoint, this product offers strong everyday utility. It combines multiple benefits—digestive support, heart health support, and appetite control—into a single supplement, making it more convenient than taking multiple products. Overall, this is a reliable, easy-to-use fiber supplement that delivers consistent results. I would confidently recommend it to anyone looking for a practical way to improve daily fiber intake and support digestive health.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 5
Excellent for Digestive Health and Easy to Incorporate into Daily Routine
Size: 2.32 Pound (Pack of 1), Style: New
I've been using Metamucil Premium Blend for a while now, and it has been a great addition to my daily health regimen. This psyllium fiber powder supplement is particularly effective for improving digestive health.
The fact that it's a 4-in-1 fiber supplement is impressive. It not only aids in regularity but also helps with maintaining healthy blood sugar levels, lowering cholesterol, and promoting digestive health. The orange flavor is pleasant, making it easy to drink, and it's great that it's sweetened with Stevia, making it a sugar-free option.
I appreciate that this supplement is plant-based. It's a natural way to increase my daily fiber intake, and I've noticed a significant improvement in my digestive regularity since I started using it. The texture of the powder is fine and it mixes well with water, without forming clumps.
The packaging is convenient, providing 180 servings, which is excellent for long-term use. It's easy to measure out each serving, and the container keeps the powder fresh.
Using Metamucil Premium Blend daily has been a simple yet effective way to enhance my overall digestive health. It's a product I trust and feel good about incorporating into my health routine.
For anyone looking to increase their fiber intake for digestive health, Metamucil Premium Blend is a great choice. It's effective, easy to use, and has a pleasant taste. Highly recommended!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 1, 2024
recommand products
Gorman-Rupp 26832-609 - Handle
149.73
2tb Kanguru Ultralock Ssd
177.19
Hewlett Packard Enterprise Hpe Dl360 G11 4510 64g 8sff Mr408i-o Svr
2878.53
Enet Solutions, Inc. Cisco Compatible Ds-sfp-fc16g-sw Tri-rate Sfp+ Taa Compliant
143.86
Pci Brand Eco-friendly Reman Hp 826a Cf313a Magenta Toner Cartridge 31500 Page Y
92.70