Be Quiet! SFX L 600W Gold or Be Quiet! Straight Power 11 Platinum? Which Be Quiet! Model to Buy
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You are looking at the be quiet sfx l quiet performance vs straight power 11 platinum. Both units deliver high efficiency and modular cabling for clean builds. The main difference lies in their physical design and target use cases. One is a compact SFX unit for small cases, while the other is a larger ATX model for standard towers. You need to decide which form factor fits your hardware.
Key differences
| Aspect | be quiet! SFX L 600W Gold Modular Power Supply | be quiet! Straight Power 11 Platinum 750W |
|---|---|---|
| Efficiency Rating | 80 PLUS Gold | 80 PLUS Platinum |
| Form Factor | SFX | ATX |
| Wattage | 600W | 750W |
| Fan Size | 120mm | 135mm |
| Modularity | Modular | Fully Modular |
Which one should you choose?
Choose be quiet! SFX L 600W Gold Modular Power Supply if
- You are building a Mini ITX PC with limited space.
- You need an SFX form factor that fits small cases.
- You prefer a slightly lower wattage for efficient daily use.
Choose be quiet! Straight Power 11 Platinum 750W if
- You require higher efficiency with Platinum certification.
- You need more power headroom with 750W output.
- You want a fully modular design for easier cable management.
Verdict: Choose the SFX L if your case requires a small form factor. Pick the Straight Power 11 if you need higher efficiency and wattage in a standard ATX size. Your decision depends entirely on your chassis constraints and power needs.
Efficiency and Size Comparison
Efficiency rating
The Be Quiet! SFX L 600W Gold achieves 80 PLUS Gold certification, reaching up to 92% efficiency. In contrast, the Be Quiet! Straight Power 11 Platinum offers 80 PLUS Platinum efficiency, hitting up to 93.7%. Platinum certification indicates superior energy conversion performance under typical loads. You will lose less power as heat with the Platinum model. This difference matters for electricity costs and thermal output in enclosed spaces. While both are excellent, the Platinum rating provides a clear technical advantage for efficiency seekers.
Form factor and size
The SFX L 600W Gold is designed for Mini ITX builds, measuring 4.92 inches wide, 2.52 inches high, and 5.12 inches long. It weighs 2.56 pounds. The Straight Power 11 Platinum is a standard ATX unit, measuring 9.75 inches wide, 4 inches high, and 13 inches long. It weighs 3.75 pounds. If you are building in a small case, the SFX L is the only viable option. The Straight Power requires a standard mid-tower or full-tower chassis. Size compatibility is your primary deciding factor here.
Modularity
Both power supplies feature modular cabling to help you manage wires inside your case. The SFX L 600W Gold is listed as modular, offering flexibility for cable management. The Straight Power 11 Platinum is fully modular, meaning every cable can be disconnected. While the SFX L allows you to remove unnecessary cables, the Straight Power gives you complete control over every connection. For most users, both options provide sufficient flexibility to keep your build clean. The distinction between modular and fully modular is minor for typical desktop setups.
Fan and cooling
The SFX L 600W Gold uses a temperature-controlled 120mm fan. It adjusts speed based on internal heat. The Straight Power 11 Platinum features a 135mm Silent Wings 3 fan. It has a funnel-shaped intake for high airflow and is described as virtually inaudible. Larger fans generally move more air at lower speeds, reducing noise. The Straight Power’s design prioritizes acoustic performance more aggressively. The SFX L fan is effective but may spin faster under load due to its smaller size and compact enclosure.
Wattage capacity
The SFX L 600W Gold provides 600W of power. It supports multi-GPU setups with four PCIe connectors. The Straight Power 11 Platinum delivers 750W. This extra 150W allows you to power higher-end graphics cards and more components simultaneously. If your system requires more than 600W, the SFX L will not suffice. The Straight Power offers greater headroom for future upgrades or demanding hardware. For high-performance builds, the higher wattage of the Platinum model is a significant advantage.
Internal technology
The SFX L 600W Gold utilizes stable LLC, Synchronous Rectifier, and DC-to-DC power conversion. These technologies ensure stable voltage delivery and high efficiency in a small footprint. The Straight Power 11 Platinum uses wire-free internal connections on the DC side. This design enhances cooling and longevity by reducing resistance and heat buildup. Both approaches are engineered for reliability. The SFX L focuses on compact efficiency, while the Straight Power emphasizes thermal management through its internal layout. Both are solid choices for stable power delivery.
Which be quiet power supply suits you
Small form factor builders needing 600W
You need a compact SFX power supply for a Mini ITX build. This model measures 5.12 inches long and fits tight cases. It includes an adapter bracket to fit larger ATX chassis if needed. The 120mm fan provides stable cooling for your components without taking up valuable space inside your small enclosure.
Users wanting highest efficiency and quiet operation
You prioritize maximum efficiency and silent performance. This unit holds 80 PLUS Platinum certification, reaching up to 93.7% efficiency. It uses a 135mm Silent Wings 3 fan that is virtually inaudible. The internal design features wire-free DC sides for better airflow and longevity, making it ideal for noise-sensitive environments.
High wattage gaming systems requiring 750W
You require more power for high-end components. This model delivers 750W of continuous power, which exceeds the 600W limit of the SFX L. It supports fully modular cabling for clean cable management. The larger 13-inch length accommodates higher wattage requirements while maintaining stable voltage regulation for demanding gaming or workstation tasks.
The products compared
be quiet! SFX L 600W Gold Modular Power Supply
Best for: Compact 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 is a 600W SFX-L power supply designed for Mini ITX systems. It carries 80 PLUS Gold certification for up to 92% efficiency. The unit includes a temperature-controlled 120mm fan and fully modular cables. It supports multiple GPUs with four PCIe connectors. It also comes with an SFX-to-ATX adapter bracket for larger cases. This model suits gamers building compact PCs who need reliable power delivery.
Pros
- 80 PLUS Gold efficiency rating
- Temperature-controlled 120mm fan
- Fully modular cable design
- Includes SFX-to-ATX adapter bracket
Cons
- Lower wattage than the 750W competitor
- Shorter 3-year warranty period
- SFX-L form factor limits case compatibility
Good fit if
- You are building a Mini ITX gaming PC
- You need efficient power for a compact case
- You require modular cables for clean builds
Skip if
- You need more than 600W of power
- You prefer a standard ATX form factor
- You want a longer warranty period
Verdict: Be Quiet! SFX L 600W Gold is a solid choice for Mini ITX builders who prioritize efficiency and compact dimensions over maximum wattage.
be quiet! Straight Power 11 Platinum 750W
Best for: Standard ATX cases needing high efficiency
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully modular
- Fan Size
- 135mm
- Dimensions
- 13 × 9.75 × 4 inches
- Weight
- 3.75 pounds
View on Amazon: be quiet! Straight Power 11 Platinum 750W Affiliate link
This is a fully modular 750W power supply with 80 PLUS Platinum efficiency. It uses a 135mm Silent Wings 3 fan for quiet operation. The unit measures 13 by 9.75 by 4 inches and weighs 3.75 pounds. It suits builders who need high efficiency and low noise in a standard ATX case. It is not suitable for small form factor builds.
Pros
- 80 PLUS Platinum efficiency up to 93.7%
- 135mm Silent Wings 3 fan for low noise
- Fully modular cable design
- Wire-free DC side for better cooling
Cons
- Too large for SFX or SFX-L cases
- Heavier than compact power supplies
- Higher price point than Gold models
Good fit if
- You are building in a standard ATX mid or full tower case
- You prioritize high efficiency and quiet operation
- You need 750W of continuous power
Skip if
- You are building in a small form factor case
- You need SFX or SFX-L dimensions
- You are on a tight budget
Verdict: be quiet! Straight Power 11 750W Platinum delivers high efficiency and quiet performance for standard ATX builds. It fits users who value silence and efficiency over compact size.
Specifications side by side
| Spec | be quiet! SFX L 600W Gold Modular Power Supply | be quiet! Straight Power 11 Platinum 750W |
|---|---|---|
| Wattage | 600W | 750W |
| Efficiency Rating | 80 PLUS Gold | 80 PLUS Platinum |
| Modularity | Modular | Fully modular |
| Fan Size | 120mm | 135mm |
| Warranty | 3-Year | not stated |
| Form Factor | Mini ITX | not stated |
| Recommended Use | Gaming | not stated |
| Size | 600W | 750W |
| Device Compatibility | PCs | not stated |
| Dimensions | 5.12 × 4.92 × 2.52 inches | 13 × 9.75 × 4 inches |
| Weight | 2.56 pounds | 3.75 pounds |
| Color | Black | Black |
| Model | BN639 | BN642 |
Frequently asked questions
Is the Be Quiet! SFX L 600W Gold compatible with all Mini ITX cases?
Yes, but you must verify internal dimensions. This unit measures 5.12 inches in length, 4.92 inches in width, and 2.52 inches in height. Some compact cases have tight clearances that may not accommodate this specific size. Always check your case specifications before purchasing to ensure a proper fit for your build.
Does the Straight Power 11 Platinum include all necessary cables?
Yes, it is fully modular. You only connect the cables you need, which helps keep your build clean. This reduces clutter inside your case and improves airflow. The unit itself is larger, measuring 13 inches in length, so ensure your ATX case has enough space for this form factor.
Which power supply is better for a small form factor build?
The Be Quiet! SFX L 600W Gold is the better choice. It is designed specifically for Mini ITX systems with a compact SFX form factor. Its smaller dimensions allow it to fit into tight spaces where standard ATX units will not. This makes it ideal for builders prioritizing size over maximum wattage.
How much heavier is the Straight Power 11 Platinum than the SFX L?
The Straight Power 11 Platinum weighs 3.75 pounds, while the SFX L weighs 2.56 pounds. The difference is 1.19 pounds. This additional weight comes from its larger internal components and ATX form factor. The SFX L remains lighter due to its compact design intended for smaller cases.
Can I use the SFX L 600W Gold in a standard ATX case?
Yes, but you may need an adapter. The product description mentions it includes an adapter bracket to fit larger ATX mounts. This allows you to use the compact SFX unit in a standard ATX case. However, you are limited to 600W output, which may not suffice for high-end gaming rigs.
What is the difference in efficiency between Gold and Platinum ratings?
Platinum is more efficient than Gold. The Straight Power 11 Platinum reaches up to 93.7% efficiency, while the SFX L Gold reaches up to 92%. Higher efficiency means less wasted energy as heat. This can lead to lower electricity costs and quieter operation, as fans may spin less frequently.
Is the Straight Power 11 Platinum suitable for high-end gaming?
Yes, it delivers 750W of power. This wattage is sufficient for high-end components in a standard ATX build. It also offers 80 PLUS Platinum efficiency, ensuring stable power delivery. If you need more than 600W, this model provides the extra headroom required for demanding gaming setups.