SCYTHE Kaze Flex II 120mm or SCYTHE Wonder Tornado 120 Slim? Which SCYTHE Model to Buy
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Choosing between the scythe kaze flex ii 120mm vs wonder tornado 120 slim comes down to your specific airflow needs. Both are 120mm slim fans with 15mm profiles and Fluid Dynamic Bearings rated for 120,000 hours. They share 4-pin PWM connectors for motherboard control. The main difference lies in their performance targets. The Kaze Flex II focuses on optimized volume airflow with a fixed max speed. The Wonder Tornado offers a wider speed range and higher static pressure capabilities for restricted spaces.
Key differences
| Aspect | Scythe Kaze Flex II 120mm Slim Fan | Scythe Wonder Tornado 120 Slim White |
|---|---|---|
| Max Fan Speed | 1800 RPM | 2000 RPM |
| Speed Range | Not listed | 400-2000 RPM |
| Max Airflow | Not listed | 34.31 CFM |
| Noise Level | Not listed | 3.12-26.36 dBA |
| Included Accessories | Not listed | Shock-absorbing mounts and 200mm extension cable |
Which one should you choose?
Choose Scythe Kaze Flex II 120mm Slim Fan if
- You need a fan with a slightly lower maximum speed for potentially quieter operation at lower settings.
- You are building a Mini-ITX system and want the frame to be 1mm slimmer than the previous generation.
Choose Scythe Wonder Tornado 120 Slim White if
- You require higher static pressure and a wider adjustable speed range for dense components.
- You want included mounting hardware and an extension cable for easier installation.
Verdict: The Wonder Tornado 120 Slim is the better choice if you need higher airflow, a wider speed range, and included accessories. The Kaze Flex II 120mm Slim is suitable if you prioritize a slightly lower maximum speed and a frame designed for minimal ITX clearance. Both offer long-term reliability with their bearing types.
Fan Speed and Airflow Comparison
Max Fan Speed
The Scythe Wonder Tornado 120 Slim White reaches a maximum speed of 2000 RPM. This allows it to push air faster when your system needs extra cooling. The Scythe Kaze Flex II 120mm Slim Fan tops out at 1800 RPM. This lower maximum speed means the Kaze Flex II generates less noise at its peak. The Wonder Tornado offers a wider speed range, starting from 400 RPM. This gives you more control over noise levels during light loads. If you need maximum airflow, the higher RPM of the Wonder Tornado is the better choice.
Airflow Volume
Airflow volume determines how much cool air moves through your case. The Scythe Wonder Tornado 120 Slim White delivers up to 34.31 CFM of airflow. This high volume helps cool components quickly. The specifications for the Scythe Kaze Flex II 120mm Slim Fan do not list a specific CFM value. Without this data, you cannot compare the exact air movement. However, the Kaze Flex II is designed for low-noise operation. The Wonder Tornado prioritizes high static pressure and volume. For pure airflow performance, the Wonder Tornado has the clear advantage based on the listed specs.
Noise Levels
Noise is critical for a quiet PC build. The Scythe Wonder Tornado 120 Slim White operates between 3.12 and 26.36 dBA. These levels are quite low, especially at lower speeds. The Scythe Kaze Flex II 120mm Slim Fan focuses on low-noise design, but its exact decibel rating is not provided in the data. The Kaze Flex II uses a specialized frame to reduce noise. The Wonder Tornado provides explicit noise data. You can trust the Wonder Tornado’s quiet performance because it is measured. The Kaze Flex II is described as quiet, but lacks specific numbers for comparison.
Bearing Type
Both fans use Fluid Dynamic Bearings for smooth operation. The Scythe Kaze Flex II 120mm Slim Fan uses a proprietary Fluid Dynamic Bearing. It is made with high-quality compressed metal for stability. The Scythe Wonder Tornado 120 Slim White uses a Sealed FDB bearing. This sealed design helps keep dust out and extends lifespan. Both fans are rated for 120,000 hours. This long lifespan means you will not need to replace them often. The bearing types are very similar in function. Both offer reliable, long-term durability for your PC case.
Connector Type
Connection type affects how you control the fan speed. Both the Scythe Kaze Flex II 120mm Slim Fan and the Scythe Wonder Tornado 120 Slim White use 4-Pin PWM connectors. This standard connector allows your motherboard to control the fan speed automatically. You can adjust the speed via software or BIOS settings. This compatibility works with most modern motherboards. Neither fan requires a separate controller. The PWM control ensures you get the right balance of cooling and noise. Both fans offer the same convenient connection method.
Included Accessories
Accessories help with installation and cable management. The Scythe Wonder Tornado 120 Slim White includes mounting hardware with four shock-absorbing mounts. It also comes with a 200mm extension cable. This cable gives you flexibility in placing the fan. The specifications for the Scythe Kaze Flex II 120mm Slim Fan do not list any included accessories. You may need to buy mounts or cables separately. The Wonder Tornado provides a complete package for easy setup. This makes it more convenient for immediate installation without extra purchases.
Pick Your Ideal Scythe Fan
Users needing high static pressure
The Wonder Tornado 120 Slim White is built for high static pressure. Its 2000 RPM max speed and 34.31 CFM airflow deliver strong force. This makes it ideal for radiators or dense filters. The sealed FDB bearing ensures smooth, quiet operation. You get reliable performance for constrained spaces where air resistance is high.
Budget-conscious ITX builders
The Kaze Flex II focuses on space efficiency for Mini-ITX builds. Its 1mm slimmer frame than the predecessor provides extra clearance. The 1800 RPM speed offers quiet cooling with a 120,000-hour lifespan. The Fluid Dynamic Bearing guarantees stability. You get a compact, durable solution that fits tight cases without sacrificing long-term reliability.
Those wanting included accessories
The Wonder Tornado 120 Slim White includes mounting hardware with shock-absorbing mounts and a 200mm extension cable. This complete package simplifies installation. You do not need to buy separate cables or mounts. The adjustable PWM speed from 400 to 2000 RPM lets you fine-tune noise levels. It is a ready-to-use solution for flexible setups.
The products compared
Scythe Kaze Flex II 120mm Slim Fan
Best for: Mini-ITX builds requiring slim 15mm fans
- Fan Size
- 120mm
- Max Fan Speed
- 1800RPM
- Connector Type
- 4-Pin
- Bearing Type
- Fluid Dynamic Bearing
- Dimensions
- 9 × 6 × 1 inches
View on Amazon: Scythe Kaze Flex II 120mm Slim Fan Affiliate link
The Scythe Kaze Flex II 120mm is a 15mm thick PWM case fan designed for tight spaces. It features a Fluid Dynamic Bearing and runs up to 1800 RPM. This model offers a 4-pin connector for speed control. Its slim frame saves space for Mini-ITX builds. You get high airflow with low noise. It suits those needing compact cooling solutions.
Pros
- 15mm slim profile saves space in Mini-ITX cases
- Fluid Dynamic Bearing ensures long lifespan up to 120,000 hours
- 4-pin PWM connector allows precise speed control
- Runs up to 1800 RPM for strong airflow
Cons
- 15mm thickness limits use in standard 25mm slots
- No RGB lighting included in specifications
- 120,000 hour lifespan is lower than premium 150,000 hour models
Good fit if
- You are building a Mini-ITX PC with limited depth
- You need quiet cooling for dense component layouts
- You prefer standard 4-pin PWM fan control
Skip if
- You require RGB lighting effects for your build
- You need a thicker fan for maximum static pressure
- You are using a motherboard with only 3-pin headers
Verdict: The Scythe Kaze Flex II 120mm Slim Fan fits Mini-ITX builders who need compact, quiet cooling. Its slim design and reliable bearing make it a solid choice for tight cases.
Scythe Wonder Tornado 120 Slim White
Best for: tight cases needing quiet airflow
- Fan Size
- 120mm
- Max Fan Speed
- 2000 RPM
- Max Airflow
- 34.31 CFM
- Noise Level
- 26.36 dBA
- Connector Type
- PWM
- Bearing Type
- Sealed FDB
View on Amazon: Scythe Wonder Tornado 120 Slim White Affiliate link
This 120mm x 15mm fan delivers high static pressure with a 400-2000 RPM range. It moves 34.31 CFM of air while staying whisper quiet at just 3.12 dBA. The sealed FDB bearing promises a 120,000-hour lifespan. It includes shock-absorbing mounts and a 200mm cable. You should choose this for tight cases needing quiet, reliable airflow.
Pros
- Ultra-thin 15mm profile fits space-constrained builds
- Sealed FDB bearing for 120,000-hour reliability
- PWM control allows 400-2000 RPM adjustment
- Ultra-low noise from 3.12 dBA
- Includes 200mm extension cable and mounts
Cons
- Lower maximum airflow than standard 25mm fans
- Higher noise level at full speed compared to other fans
- No included speed controller or splitter cable
Good fit if
- You need a fan for a tight case
- You prioritize low noise at low speeds
- You want a long-lasting sealed bearing
Skip if
- You need maximum airflow for heavy cooling
- You want a standard 25mm thickness fan
- You need a fan for a thick radiator
Verdict: Scythe Wonder Tornado 120 Slim White is a specialized fan for tight cases. It suits users who need quiet operation in confined spaces rather than raw airflow.
Specifications side by side
| Spec | Scythe Kaze Flex II 120mm Slim Fan | Scythe Wonder Tornado 120 Slim White |
|---|---|---|
| Fan Size | 120mm | 120mm |
| Max Fan Speed | 1800RPM | 2000 RPM |
| Max Airflow | not stated | 34.31 CFM |
| Noise Level | not stated | 26.36 dBA |
| Connector Type | 4-Pin | PWM |
| Bearing Type | Fluid Dynamic Bearing | Sealed FDB |
| Dimensions | 9 × 6 × 1 inches | 4.72 × 4.72 × 0.59 inches |
| Size | 1800RPM | not stated |
| Model | KFS1215FD18-P | WT1215FD20W-P |
Frequently asked questions
Which fan is better for a Mini-ITX build?
The Scythe Kaze Flex II 120mm Slim Fan is the better choice for Mini-ITX builds. It is specifically designed for tight cases where space is limited. Its 15mm profile ensures it fits without obstructing other components. The included 4-pin connector allows for easy PWM control from your motherboard.
What is the difference in physical dimensions between the two fans?
The dimensions differ significantly between the models. The Kaze Flex II measures 9 inches in length and 6 inches in width. In contrast, the Wonder Tornado 120 Slim White is more compact at 4.72 inches by 4.72 inches. Both maintain a slim profile, but their footprints vary.
Do both fans use the same bearing type?
Yes, both fans utilize a Fluid Dynamic Bearing. This bearing type is known for providing smooth operation and reliability over time. It helps reduce noise levels compared to older bearing technologies. You can expect consistent performance from either model due to this shared mechanical feature.
Which fan offers higher maximum airflow speed?
The Wonder Tornado 120 Slim White offers a higher maximum speed of 2000 RPM. The Kaze Flex II 120mm Slim Fan tops out at 1800 RPM. Higher RPM generally translates to increased airflow volume. Choose the Wonder Tornado if you need faster air movement for dense radiators or filters.
How do I control the fan speed on these models?
Both fans use a 4-pin PWM connector for speed control. This allows your motherboard to adjust the RPM automatically based on system temperature. You do not need additional controllers for basic operation. Simply plug the 4-pin connector into a compatible header on your motherboard for efficient management.
Is the Wonder Tornado 120 Slim White available in white?
Yes, the Wonder Tornado 120 Slim White is available in a white color option. This makes it suitable for builds where aesthetics matter. The white finish helps it blend in with white-themed PC cases. It maintains the same slim 15mm profile as other models in the series.