SCYTHE Wonder Tornado 120 Slim or SCYTHE Kaze Flex II 120mm? Which SCYTHE Model to Buy
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This scythe wonder tornado 120 slim vs kaze flex ii 120 comparison helps you pick the right 120mm case fan. Both models share a 15mm slim profile, Fluid Dynamic Bearing for longevity, and 4-Pin PWM connectors. They also both target silent operation with optimized blade designs. The main difference lies in their maximum speed and blade count. The Wonder Tornado spins faster, while the Kaze Flex II uses more blades for potentially smoother airflow. You need to decide which performance trait matters more for your build.
Key differences
| Aspect | Scythe Wonder Tornado 120 Slim Fan | Scythe Kaze Flex II 120mm Slim Fan |
|---|---|---|
| Max Fan Speed | 2000RPM | 1800RPM |
| Blade Count | 9 blades | 11 blades |
| Model Number | WT1215FD20-P | KFS1215FD18-P |
Which one should you choose?
Choose Scythe Wonder Tornado 120 Slim Fan if
- You prioritize higher maximum rotational speed for aggressive cooling
- You prefer a design with fewer blades that moves more air per rotation
- You want a fan rated for 2000RPM on your motherboard PWM header
Choose Scythe Kaze Flex II 120mm Slim Fan if
- You prefer a fan with more blades for potentially smoother air delivery
- You are building in a tight space and value the 1800RPM limit
- You want a model explicitly marketed as an upgrade to a previous frame design
Verdict: The Wonder Tornado 120 Slim suits users who need higher peak airflow at 2000RPM. The Kaze Flex II 120mm is better for those who prefer a higher blade count and slightly lower maximum speed. Both offer identical bearing types and slim profiles for versatile installation.
Wonder Tornado vs Kaze Flex II
Maximum speed
The Scythe Wonder Tornado 120 Slim reaches a top speed of 2000 RPM. This higher rotation rate allows it to move more air quickly, which is useful if you need to push air through dense filters or tight spaces. The Scythe Kaze Flex II 120mm Slim tops out at 1800 RPM. While slightly slower, it still provides strong airflow for general case ventilation. You will notice the difference in raw air volume when the fans are running at their peak. The Wonder Tornado holds the advantage here for maximum performance.
Blade count
Blade count affects how air is cut and moved. The Wonder Tornado 120 Slim uses nine optimized blades to generate volume airflow. The Kaze Flex II 120mm Slim features eleven highly optimized fan blades. More blades can sometimes mean smoother airflow and potentially less vibration, though this depends on the blade design. Both designs aim for minimal disturbance. The Kaze Flex II has more blades, which may offer a slight edge in airflow consistency for some users.
Bearing type
Both fans use Scythe’s proprietary Fluid Dynamic Bearing. This bearing type uses a shaft surrounded by a thin layer of oil to reduce friction. It provides quiet operation and long-term durability. Both models claim a lifespan of up to 120,000 hours. The bearing and pressure shaft in each are made from high-quality compressed metal for stability. Since both share this exact technology and rating, there is no difference in expected longevity or noise floor from the bearing itself.
Connector type
Connectivity is identical for both units. Each fan comes with a 4-Pin PWM connector. This allows you to control the fan speed directly from your motherboard. PWM signals let your system adjust the RPM based on temperature needs. You get full speed control without needing extra adapters. This standard connection ensures compatibility with most modern PC cases and motherboards. Neither fan has a unique connector advantage. Both offer the same flexible integration options.
Slim profile
Both fans share a 15mm slim profile. This thin design is ideal for tight spaces, such as front intake mounts or behind radiators. The Kaze Flex II frame is noted to be 1mm slimmer than its predecessor, but both current models fit the 15mm standard. This consistent thickness means you can swap them in similar spots without worrying about clearance issues. The slim build helps you fit more fans or components into small form factor cases. Both excel in compact builds.
Which scythe 120mm fan suits you
High airflow and dense filter needs
The Wonder Tornado 120 Slim reaches 2000 RPM. This higher speed moves air faster than the Kaze Flex II. You should pick this model if you need strong static pressure. It pushes air through tight spaces effectively. The 9 optimized blades support this high-speed performance. Use it for radiators or dense mesh filters where maximum volume matters most.
Mini-ITX builders with tight spaces
The Kaze Flex II features a frame that is 1mm slimmer than its predecessor. This extra space helps in Mini-ITX builds with limited clearance. It offers 11 optimized blades for steady airflow at 1800 RPM. Choose this fan if you need to fit a 120mm fan into a tight 15mm slot. The slim design ensures better compatibility with small form factor cases.
Quiet operation with balanced specs
Both fans use Fluid Dynamic Bearings for a 120,000-hour lifespan. The Kaze Flex II runs at 1800 RPM, which is slightly quieter than the 2000 RPM Wonder Tornado. If you prioritize lower noise levels over maximum speed, this is the better choice. It delivers efficient cooling with minimal disturbance. The 11-blade design maintains airflow while keeping sound output low.
The products compared
Scythe Wonder Tornado 120 Slim Fan
Best for: tight spaces needing high static pressure
- Fan Size
- 120mm
- Max Fan Speed
- 2000RPM
- Connector Type
- 4-Pin PWM
- Bearing Type
- Fluid Dynamic Bearing
- Dimensions
- 4.72 × 0.59 × 4.72 inches
View on Amazon: Scythe Wonder Tornado 120 Slim Fan Affiliate link
This 120mm fan measures 15mm thick and runs at 2000 RPM. It uses a Fluid Dynamic Bearing for stability. The 4-pin PWM connector allows speed control. The design focuses on high static pressure and low noise. It suits builds needing slim profile cooling with durable components.
Pros
- 120mm x 15mm slim profile
- Fluid Dynamic Bearing
- 4-pin PWM connector
- 2000 RPM max speed
- High static pressure design
Cons
- Slim 15mm thickness limits airflow volume
- No included mounting hardware listed
- No noise rating in dB provided
Good fit if
- You need a 15mm slim fan
- You require PWM speed control
- You prioritize static pressure
Skip if
- You need a standard 25mm fan
- You want included mounting screws
- You need a noise rating
Verdict: Scythe Wonder Tornado 120 Slim offers a slim 15mm profile with PWM control. It fits tight spaces where high static pressure is needed.
Scythe Kaze Flex II 120mm Slim Fan
Best for: Mini-ITX builds needing extra clearance
- 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 120 Slim is a 120mm x 15mm PWM fan designed for tight spaces. It reaches a maximum speed of 1800 RPM using a fluid dynamic bearing. This bearing ensures quiet operation and a lifespan of up to 120,000 hours. The 1mm slimmer frame offers extra room for Mini-ITX builds. You get a 4-pin connector for precise speed control. It suits users who need high airflow in confined areas.
Pros
- Slim 15mm profile saves space in Mini-ITX cases
- Fluid dynamic bearing lasts up to 120,000 hours
- 1800 RPM max speed for strong airflow
- 4-pin PWM connector for precise control
Cons
- 15mm thickness may not fit standard 25mm mounts
- No included mounting screws or hardware listed
- Single fan requires multiple units for full coverage
Good fit if
- You are building a compact Mini-ITX PC
- You need extra clearance behind the motherboard
- You want quiet cooling with long durability
Skip if
- You require standard 25mm thick fans
- You need RGB lighting effects
- You are building a large ATX tower
Verdict: Scythe Kaze Flex II 120 Slim delivers reliable airflow in tight spaces. It fits Mini-ITX builders who prioritize clearance and bearing longevity over standard fan dimensions.
Specifications side by side
| Spec | Scythe Wonder Tornado 120 Slim Fan | Scythe Kaze Flex II 120mm Slim Fan |
|---|---|---|
| Fan Size | 120mm | 120mm |
| Max Fan Speed | 2000RPM | 1800RPM |
| Connector Type | 4-Pin PWM | 4-Pin |
| Bearing Type | Fluid Dynamic Bearing | Fluid Dynamic Bearing |
| Dimensions | 4.72 × 0.59 × 4.72 inches | 9 × 6 × 1 inches |
| Size | 2000RPM | 1800RPM |
| Model | WT1215FD20-P | KFS1215FD18-P |
Frequently asked questions
Which SCYTHE fan is better for high static pressure?
The Scythe Wonder Tornado 120 Slim is the better choice for high static pressure applications. It reaches a maximum speed of 2000 RPM, which allows it to push air more forcefully through dense radiators or filters. This higher rotation rate makes it ideal for tight spaces where moving air against resistance is critical for cooling performance.
Do both fans use the same bearing type?
Yes, both models utilize a Fluid Dynamic Bearing. This bearing type is designed to provide smooth operation and extended longevity compared to standard sleeve bearings. It helps reduce friction and noise over time, ensuring that your case fans remain reliable and quiet throughout their lifespan without requiring frequent maintenance or replacement.
Is the connector type the same for both fans?
Both the Wonder Tornado 120 Slim and the Kaze Flex II 120mm use a 4-Pin connector. This standard PWM connector allows your motherboard to automatically control fan speed based on system temperatures. You can integrate either fan into your existing cooling setup without needing additional adapters or specialized wiring for power and control.
Which fan is better for Mini-ITX builds?
The Scythe Kaze Flex II 120mm is often preferred for Mini-ITX builds that require extra clearance. While both share a slim profile, the Kaze Flex II is specifically noted for fitting tight spaces where clearance is a priority. Its design helps builders who need to fit components into compact cases without interference from standard-sized hardware.
What is the maximum speed difference between these two fans?
The Wonder Tornado 120 Slim has a maximum speed of 2000 RPM, while the Kaze Flex II 120mm tops out at 1800 RPM. This 200 RPM difference means the Wonder Tornado can move air more quickly, which is beneficial for static pressure. The Kaze Flex II offers slightly lower maximum airflow but maintains efficient operation.
Are both fans considered slim profiles?
Yes, both fans are designed with a slim 15mm profile. This reduced thickness allows them to fit into tight spaces within computer cases, such as behind drive cages or in compact chassis. The slim design ensures they do not obstruct other components, making them suitable for small form factor builds where space is limited.
Which model is best for tight spaces needing high pressure?
The Scythe Wonder Tornado 120 Slim is best for tight spaces that require high static pressure. Its 2000 RPM speed enables it to push air effectively through restricted areas like dense mesh filters or radiators. If your build involves blocking airflow, this model provides the necessary force to maintain adequate cooling for your components.