Be Quiet! SFX L 600W Gold vs Be Quiet! TFX Power 3 TFX: Spec Comparison
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This comparison of be quiet sfx l quiet performance vs tfx power 3 highlights two distinct power supply options from the same brand. Both units are designed for compact builds and share a black finish. The primary difference lies in their form factors and efficiency ratings. One unit offers 80 PLUS Gold efficiency and modular cabling, while the other follows a different physical standard. You need to check the specific dimensions and power requirements of your case to ensure compatibility with either option.
Key differences
| Aspect | be quiet! SFX L 600W Gold Modular Power Supply | Be Quiet! TFX Power 3 TFX Power Supply |
|---|---|---|
| Form Factor | SFX | TFX |
| Efficiency Rating | 80 PLUS Gold | not listed |
| Modularity | Modular | not listed |
| Dimensions (W x H x L) | 4.92 x 2.52 x 5.12 inches | 3.35 x 2.56 x 6.89 inches |
| Weight | 2.56 pounds | 3.09 pounds |
Which one should you choose?
Choose be quiet! SFX L 600W Gold Modular Power Supply if
- You need 80 PLUS Gold efficiency for better power savings.
- You require modular cables for cleaner cable management.
- Your case supports SFX form factor power supplies.
Choose Be Quiet! TFX Power 3 TFX Power Supply if
- Your system case is designed specifically for TFX power supplies.
- You prefer a narrower width for tight fits.
- You are building in a form factor that mandates TFX standards.
Verdict: Choose the SFX L if you want verified high efficiency and modular flexibility. Select the TFX Power 3 if your case strictly requires the TFX form factor. The SFX L provides more transparent specifications for efficiency and connectivity.
SFX L 600W vs TFX Power 3 Specs
Efficiency Rating
The be quiet! SFX L 600W Gold carries an 80 PLUS Gold certification. This rating indicates up to 92% efficiency at typical loads, meaning less energy waste and lower heat output during operation. The TFX Power 3 data does not list an efficiency rating. Without this specification, you cannot confirm its power conversion performance. Higher efficiency usually translates to better thermal management and reduced electricity costs over time. If power conservation and thermal headroom are priorities, the Gold-rated SFX L offers a clear advantage. The TFX unit lacks this published metric in the provided data.
Form Factor
Form factor dictates which cases can accept these power supplies. The SFX L 600W follows the SFX standard, measuring 4.92 inches wide, 2.52 inches high, and 5.12 inches long. It also includes an SFX-to-ATX adapter bracket, allowing installation in larger ATX cases. The TFX Power 3 uses the TFX form factor, with dimensions of 3.35 inches wide, 2.56 inches high, and 6.89 inches long. TFX units are generally thinner but longer. You must check your case specifications carefully. The SFX L provides greater compatibility flexibility due to the included adapter bracket.
Modularity
Cable management is crucial in small form factor builds. The SFX L 600W is a fully modular unit. This feature allows you to connect only the cables you need, reducing clutter and improving airflow inside tight chassis. The TFX Power 3 data does not mention modularity. It is likely a non-modular unit, as is common for this form factor, but the data does not confirm this. Non-modular units come with all cables attached, which can obstruct component installation in small cases. For builders who value clean interiors and easier maintenance, the modular design of the SFX L is a significant practical benefit.
Wattage Output
Power delivery capacity determines what components you can run. The SFX L 600W provides 600W of continuous power. This is a robust output for Mini ITX systems, supporting high-end graphics cards and CPUs. The TFX Power 3 data does not list a wattage rating. TFX units typically offer lower wattages, often between 300W and 500W, but you must verify this with the manufacturer. Without a stated wattage, the TFX unit appears less capable for power-hungry builds. If you plan to use discrete graphics cards or overclocked components, the 600W output of the SFX L is essential.
Fan Size
Cooling fans impact noise levels and thermal performance. The SFX L 600W features a 120mm temperature-controlled fan. Larger fans can move more air at lower speeds, often resulting in quieter operation under light loads. The TFX Power 3 data does not specify fan size or type. TFX units typically use smaller fans, such as 80mm or 92mm, which may spin faster to achieve the same cooling, potentially increasing noise. The 120mm fan in the SFX L suggests a focus on acoustic performance. For users prioritizing silence, the larger fan size is a measurable advantage.
Choose based on your case size
SFX case builders seeking efficiency
If your chassis uses the SFX form factor, this unit fits directly. The 80 PLUS Gold rating ensures up to 92% efficiency. This reduces wasted energy and heat. The included adapter bracket also allows installation in larger ATX cases if needed later.
TFX case owners needing compact fit
Your build requires a TFX power supply. This model measures 6.89 inches in length and 3.35 inches in width. It is designed specifically for TFX cases. The data confirms it meets the physical dimensions required for these compact systems without modification.
Users wanting modular cable flexibility
This SFX unit features modular cables. You can connect only the cables you need. This reduces clutter inside small cases. The TFX model data does not list modularity. If clean cable management is a priority, the modular SFX option is the practical choice.
The products compared
be quiet! SFX L 600W Gold Modular Power Supply
Best for: quiet Mini ITX gaming builds
- Wattage
- 600W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Modular
- Fan Size
- 120mm
- Warranty
- 3-Year
- Form Factor
- Mini ITX
View on Amazon: be quiet! SFX L 600W Gold Modular Power Supply Affiliate link
This 600W SFX power supply delivers 80 PLUS Gold efficiency, reaching up to 92% efficiency. It features a 120mm fan for quiet operation and modular cables for flexible builds. The unit supports multi-GPU setups with four PCIe connectors and includes an SFX-to-ATX adapter bracket. It is designed for Mini ITX gaming PCs and offers stable power conversion.
Pros
- 80 PLUS Gold certification for up to 92% efficiency
- 120mm temperature-controlled fan for quiet performance
- Fully modular cables for build flexibility
- Includes SFX-to-ATX adapter bracket
- Supports multi-GPU with four PCIe connectors
Cons
- Limited to 600W output compared to higher wattage options
- 3-year warranty is shorter than industry standards
- SFX form factor restricts case compatibility
Good fit if
- You need a compact power supply for a Mini ITX case
- You want high efficiency to reduce heat and power waste
- You plan to use multiple GPUs in a small build
Skip if
- You require more than 600W of power
- You prefer a standard ATX form factor
- You need a warranty longer than 3 years
Verdict: Be Quiet SFX L 600W Gold is a compact, efficient choice for Mini ITX gaming builds that prioritize quiet operation and modular cable management.
Be Quiet! TFX Power 3 TFX Power Supply
Best for: TFX case builds
- Form Factor
- TFX
- Dimensions
- 6.89 × 3.35 × 2.56 inches
- Weight
- 3.09 pounds
View on Amazon: Be Quiet! TFX Power 3 TFX Power Supply Affiliate link
This Be Quiet! TFX Power 3 is a compact power supply built for small form factor cases. It features a TFX form factor with dimensions of 6.89 x 3.35 x 2.56 inches. The unit weighs 3.09 pounds and comes in black. It is designed for users who need a reliable power source in tight spaces. The TFX shape allows for flexible installation in chassis that support this specific standard.
Pros
- TFX form factor for small cases
- Compact length of 6.89 inches
- Slim height of 2.56 inches
- Black finish for clean builds
Cons
- TFX form factor limits compatibility to specific cases
- No 80 Plus Gold certification listed in data
- Weight of 3.09 pounds is heavier than typical SFX units
Good fit if
- You are building in a case that supports TFX power supplies
- You need a compact power supply for a small chassis
- You prefer a black power supply for aesthetic consistency
Skip if
- You require an SFX form factor for your case
- You need 80 Plus Gold efficiency certification
- You want the lightest possible power supply
Verdict: Be Quiet! TFX Power 3 600W is a suitable choice for builders using TFX-compatible small form factor cases. It provides a compact footprint for tight builds but lacks the efficiency rating of the SFX Gold option.
Specifications side by side
| Spec | be quiet! SFX L 600W Gold Modular Power Supply | Be Quiet! TFX Power 3 TFX Power Supply |
|---|---|---|
| Wattage | 600W | not stated |
| Efficiency Rating | 80 PLUS Gold | not stated |
| Modularity | Modular | not stated |
| Fan Size | 120mm | not stated |
| Warranty | 3-Year | not stated |
| Form Factor | Mini ITX | TFX |
| Recommended Use | Gaming | not stated |
| Device Compatibility | PCs | not stated |
| Dimensions | 5.12 × 4.92 × 2.52 inches | 6.89 × 3.35 × 2.56 inches |
| Weight | 2.56 pounds | 3.09 pounds |
| Size | 600W | not stated |
| Color | Black | Black |
| Model | BN639 | BN323 |
Frequently asked questions
Which power supply is better for Mini ITX gaming builds?
The Be Quiet! SFX L 600W Gold is the better choice for Mini ITX gaming builds. It offers an 80 PLUS Gold efficiency rating, which reduces heat and energy waste. Its compact dimensions of 4.92 by 2.52 by 5.12 inches fit standard SFX cases. The modular design also helps with cable management in tight spaces.
What is the main difference between the SFX L and TFX Power 3?
The primary difference is the form factor and efficiency. The SFX L 600W Gold is an SFX unit with an 80 PLUS Gold rating. The TFX Power 3 is a TFX unit that lacks this high-efficiency certification. The SFX L is also lighter and smaller in width, making it suitable for different chassis types.
Does the Be Quiet! SFX L 600W Gold have modular cables?
Yes, the Be Quiet! SFX L 600W Gold is a modular power supply. This allows you to connect only the cables you need, which helps keep your build tidy. The unit weighs 2.56 pounds and measures 600W in capacity, providing sufficient power for gaming systems while maintaining a compact footprint.
Is the TFX Power 3 suitable for small form factor cases?
Yes, the Be Quiet! TFX Power 3 is designed for TFX-compatible small form factor cases. It has a width of 3.35 inches and a length of 6.89 inches. While it lacks the 80 PLUS Gold rating of the SFX L, it provides a compact footprint that fits well in tight builds requiring the TFX standard.
How efficient is the Be Quiet! SFX L 600W Gold?
The Be Quiet! SFX L 600W Gold has an 80 PLUS Gold efficiency rating. This certification indicates up to 92% efficiency at typical loads. Higher efficiency means less energy is wasted as heat, which can help keep your system cooler and quieter during intensive gaming sessions.
Which unit weighs less, the SFX L or TFX Power 3?
The Be Quiet! SFX L 600W Gold weighs less at 2.56 pounds. The Be Quiet! TFX Power 3 weighs 3.09 pounds. The SFX L is also narrower, measuring 4.92 inches wide compared to the TFX Power 3's 3.35-inch width, though the TFX unit is longer.