Noctua vs SCYTHE: CPU Coolers Compared by Specs
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
When you compare a noctua vs SCYTHE CPU cooler, you are looking at two very different hardware categories. Noctua offers a specialized fan duct kit for small form factor builds, while SCYTHE provides a traditional tower cooler with a 120mm fan. Both products include fans, but their functions and physical dimensions differ significantly. You need to choose based on your case size and cooling architecture. This guide breaks down the specifications to help you decide which component fits your system.
Key differences
| Aspect | Noctua SFF Foam CPU Cooler Fan Duct Kit | Scythe Kotetsu 120mm CPU Cooler |
|---|---|---|
| Product Type | Fan Duct Kit | Processor Cooler |
| Fan Size | Not listed | 120mm |
| Height | 1.89 inches | 6.3 inches |
| Weight | 1.9 ounces | 1.1 pounds |
Which one should you choose?
Choose Noctua SFF Foam CPU Cooler Fan Duct Kit if
- You build in a small form factor case like the Dan A4-SFX
- You need to bridge the gap between a fan and perforated case panels
- You are using compatible Noctua low-profile coolers such as the NH-L9a series
Choose Scythe Kotetsu 120mm CPU Cooler if
- You require a complete tower cooling solution for a standard ATX case
- You prefer a cooler with a 16 cm height and 12 cm width
- You want a product that includes a 120mm PWM fan as part of the cooler
Verdict: Choose the Noctua kit if you are optimizing airflow for a compact SFF build with compatible low-profile coolers. Pick the SCYTHE Kotetsu if you need a standalone tower cooler for a larger case. Your case size and existing cooling hardware will determine the correct choice.
Noctua vs Scythe Spec Comparison
System type
You are comparing two distinct cooling solutions designed for different build styles. The Noctua NA-FD1 is a fan duct kit. It is not a cooler itself. It works with small form factor cases like the Dan A4-SFX. It helps fans draw fresh air through perforated panels. The SCYTHE Kotetsu is a full tower CPU cooler. It is a standalone unit. You install it directly onto the processor. It uses a 120mm fan for airflow. One is an accessory. The other is the primary cooling device. They serve opposite roles in a system build.
Cooling performance
The Noctua NA-FD1 does not cool on its own. It is an accessory. It claims to improve cooling by up to 5°C. This happens by reducing the gap between the fan and the case panel. It forces more air through the heatsink. The SCYTHE Kotetsu provides the actual cooling. It has a 16 cm height and a 120mm fan. It moves air across its fins directly. You get substantial cooling from the Kotetsu. The Noctua part only enhances an existing cooler. You need the SCYTHE unit for base performance. The Noctua part adds a small boost.
Fan size
The SCYTHE Kotetsu includes a 120mm fan. This is a standard size for tower coolers. It provides good airflow and noise balance. The Noctua NA-FD1 does not include a fan. It is a foam kit. It works with fans you already have. It is compatible with Noctua NH-L9i and NH-L9a models. Those coolers use 92mm fans. The SCYTHE unit has a larger fan. It moves more air by default. The Noctua kit relies on your existing fan choice.
Compatibility
The Noctua NA-FD1 is highly specific. It fits only certain small form factor cases. It works with Dan A4-SFX and Loque Ghost S1 cases. It is also compatible with specific Noctua low-profile coolers. It uses adjustable EVA foam spacers. The SCYTHE Kotetsu is a general tower cooler. It fits standard ATX cases. It does not list specific case compatibility. It is a universal tower design. The Noctua part is niche. It is for tiny builds. The SCYTHE part is for standard builds.
Dimensions
The Noctua NA-FD1 is very small. It measures 3.9 inches in width. It is 1.89 inches in height. It is 4.72 inches in length. It weighs just 1.9 ounces. It is light and compact. The SCYTHE Kotetsu is much larger. It is 16 cm tall. It weighs 480 grams. It is 2.28 inches wide. It is 6.3 inches high. It is 5.12 inches deep. The SCYTHE unit is a substantial tower. The Noctua unit is a small accessory. You need space for the SCYTHE cooler.
Which Noctua Or Scythe Fits You
Small form factor builder
You are building in a compact chassis like the Dan A4-SFX. The Noctua NA-FD1 is a fan duct kit, not a cooler. It bridges the gap between your fan and case panel. This improves airflow by up to 5°C. It adjusts from 5 to 45mm. It fits NH-L9 series coolers. This ensures your small case gets fresh air for better temperatures.
Standard tower cooler seeker
You need a traditional CPU tower cooler. The SCYTHE Kotetsu features a 120mm PWM fan. It stands 16 cm tall. The unit weighs 480 grams. It is designed as a processor cooler. This provides standard air cooling for typical desktop builds. You get a dedicated fan and heatsink assembly for your motherboard socket.
SFF airflow optimizer
You already have a low-profile cooler but lack airflow. The Noctua kit adds EVA foam spacers. It adjusts in 1mm increments. This seals the gap to the case panel. It forces air through the perforated holes. This simple addition boosts cooling performance. It is ideal for Ghost S1 cases. It works with chromax.black versions of NH-L9a and NH-L9i.
The products compared
Noctua SFF Foam CPU Cooler Fan Duct Kit
Best for: SFF builds with compatible Noctua low-profile coolers
- Features
- Fan
- Dimensions
- 4.72 × 3.9 × 1.89 inches
- Weight
- 1.9 ounces
View on Amazon: Noctua SFF Foam CPU Cooler Fan Duct Kit Affiliate link
The Noctua NA-FD1 is a fan duct kit designed for small form factor PCs. It uses EVA foam spacers adjustable from 5 to 45mm to bridge the gap between the fan and case panels. This setup improves cooling performance by up to 5°C. It fits NH-L9i and NH-L9a series coolers. The unit weighs 1.9 ounces and measures 3.9 by 4.72 inches. It suits builders using cases like the Dan A4-SFX.
Pros
- Adjustable EVA foam spacers range from 5 to 45mm
- Improves cooling performance by up to 5°C
- Compatible with NH-L9i and NH-L9a series coolers
Cons
- Only works with specific Noctua low-profile coolers
- Requires separate purchase of the CPU cooler
- Limited to SFF cases like Dan A4-SFX
Good fit if
- You use a small form factor case with perforated panels
- You own a compatible Noctua NH-L9 or NH-L9a cooler
- You want to improve airflow in a tight build
Skip if
- You use a standard ATX case with solid panels
- You do not own a compatible Noctua cooler
- You need a complete cooling solution without add-ons
Verdict: Noctua NA-FD1 Fan Duct Kit helps you squeeze extra performance from compatible low-profile coolers in small cases. It is a practical add-on for builders who already have the right cooler and case combination.
Scythe Kotetsu 120mm CPU Cooler
Best for: standard ATX cases with 16 cm clearance
- Cooler Height
- 16 cm
- Fan Size
- 120mm
- Features
- Fan
- Dimensions
- 5.12 × 2.28 × 6.3 inches
- Weight
- 1.1 pounds
View on Amazon: Scythe Kotetsu 120mm CPU Cooler Affiliate link
The SCYTHE KOTETU is a 120mm PWM fan processor cooler designed for standard ATX cases. It measures 16 cm in height and weighs 480 g. The unit includes a single 120mm fan for airflow. This cooler suits users who need a straightforward air cooling solution without complex mounting hardware or additional accessories. It fits well in cases with adequate clearance for a 16 cm tall heatsink.
Pros
- 120mm PWM fan included for standard airflow
- 16 cm height fits most mid-tower cases
- 480 g weight ensures stable mounting
Cons
- Single 120mm fan limits total heat dissipation
- No second fan or dual-tower design
- Limited compatibility with very small form factor cases
Good fit if
- You have a standard ATX case with 16 cm CPU cooler clearance
- You need a single 120mm fan solution
- You prefer a lightweight cooler under 500 g
Skip if
- You require dual-tower cooling for high-end CPUs
- Your case supports CPU coolers under 15 cm in height
- You need a cooler with multiple fans included
Verdict: SCYTHE KOTETU 120mm CPU Cooler is a basic air cooler for standard cases. It fits users who need a single 120mm fan and have 16 cm of clearance.
Specifications side by side
| Spec | Noctua SFF Foam CPU Cooler Fan Duct Kit | Scythe Kotetsu 120mm CPU Cooler |
|---|---|---|
| Cooler Height | not stated | 16 cm |
| Fan Size | not stated | 120mm |
| Features | Fan | Fan |
| Dimensions | 4.72 × 3.9 × 1.89 inches | 5.12 × 2.28 × 6.3 inches |
| Weight | 1.9 ounces | 1.1 pounds |
| Size | One Size | not stated |
| Color | Black | not stated |
| Model | NA-FD1 | FBA_4571225054094 |
Frequently asked questions
Is the Noctua NA-FD1 a CPU cooler?
No, the Noctua NA-FD1 is not a CPU cooler. It is a fan duct kit designed for small form factor builds. You use it with compatible low-profile coolers in compact cases. It helps direct airflow more efficiently. The kit measures 3.9 inches in width and 1.89 inches in height. It weighs just 1.9 ounces.
What size fan does the Scythe Kotetsu use?
The Scythe Kotetsu uses a single 120mm fan. It is a basic air cooler intended for standard ATX cases. You need 16 cm of clearance for this unit. The cooler itself weighs 1.1 pounds. It measures 5.12 inches in length and 6.3 inches in height. This model fits users needing straightforward cooling performance.
Can I use the Noctua duct kit in any case?
You should use the Noctua NA-FD1 only in small form factor cases. It is designed to work with compatible Noctua low-profile coolers. The kit helps squeeze extra performance from your existing cooler. It is a practical add-on if you already have the right cooler and case combination. It is not a standalone cooling solution.
Does the Scythe Kotetsu come with a fan?
Yes, the Scythe Kotetsu includes a 120mm fan. The product attributes list the fan as a key feature. This single fan provides the necessary airflow for the heatsink. You do not need to purchase a separate fan for basic operation. The unit is ready to install in cases with sufficient height clearance.
How tall is the Scythe Kotetsu cooler?
The Scythe Kotetsu is 6.3 inches in height. You must ensure your case provides at least 16 cm of clearance. This dimension is critical for proper installation. The cooler measures 5.12 inches in length and 2.28 inches in width. It is a compact tower design suitable for standard ATX chassis.
What is the best use case for the Noctua NA-FD1?
The Noctua NA-FD1 is best for SFF builds. It is ideal for builders who already have a compatible low-profile cooler. The kit improves airflow in small cases like the Dan A4-SFX. It bridges the gap between the fan and case panel. This setup helps maximize cooling efficiency in tight spaces.
Is the Scythe Kotetsu suitable for large cases?
The Scythe Kotetsu is suitable for standard ATX cases. It requires 16 cm of clearance to fit properly. It is not designed for extreme high-end overclocking. It serves users who need a basic air cooler. The 120mm fan provides adequate cooling for general computing tasks in mid-tower chassis.