be quiet! BN515 Straight Power 12-850w 80 Plus Platinum, ATX 3.0, Modular Power Supply, for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors, Silent 135mm be quiet! Fan - BN515
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AI Verdict
This 850-watt, 80 PLUS Platinum, ATX 3.0 modular power supply is for quiet, high-performance PC builds with PCIe 5.0 GPUs.
This 850W power supply is a strong fit for modern, high-performance systems due to its 80 PLUS Platinum efficiency and ATX 3.0 compliance, supporting the power demands of PCIe 5.0 GPUs. Its virtually inaudible fan also caters to users prioritizing a quiet computing experience.
If you're planning extreme overclocking or a multi-GPU setup, consider a higher wattage model like the 1000W or 1200W versions in the Straight Power 12 series.
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Pros
- Achieves 80 PLUS Platinum efficiency, reaching up to 93.8% for optimized power usage.
- ATX 3.0 compliant with full support for PCIe 5.0 GPUs and those using 6+2 pin connectors.
- Features a virtually inaudible Silent Wings 135mm fan with a funnel-shaped opening for enhanced airflow.
- Equipped with Japanese 105°C capacitors, ensuring superior stability and long-term reliability.
- Offers fully modular cable management, providing maximum convenience for system building.
- Backed by a 10-year manufacturer's warranty.
Cons
- The ATX 3.0 standard, while forward-looking, might be an unnecessary expense for users with certain newer GPUs (like RTX 4000/7000 series) that exhibit fewer power spikes, potentially making its advanced capacitance features less critical.
- Specific user complaints regarding performance or features are not widely reported in available reviews, making it difficult to identify common drawbacks.
Dimension Scores
The 80 PLUS Platinum certification (up to 93.8% efficiency) and ability to handle massive power excursions position it at the top tier for power delivery.
The virtually inaudible Silent Wings 135mm fan, combined with a funnel-shaped opening for optimized airflow, ensures minimal operational noise.
Utilizes Japanese 105°C capacitors for stability and reliability, alongside full bridge LLC technology for signal stability.
Its fully modular design offers maximum convenience, allowing users to connect only the necessary cables, which aids in tidiness and airflow.
Best For
- High-end gaming PCs utilizing current or next-generation PCIe 5.0 graphics cards.
- Quiet PC builds where minimal operational noise is a priority.
- Systems demanding stable power delivery during massive power excursions.
- Users who value long-term reliability and a comprehensive warranty.
Not Recommended For
- Budget-focused PC builds where an 850W Platinum-rated PSU exceeds the component cost.
- Systems with lower power requirements (e.g., integrated graphics or entry-level GPUs) where 850W is excessive.
- Users who prioritize the absolute lowest initial cost over long-term efficiency and quiet operation.
Watch Out For
- While ATX 3.0 is a key feature, some users on Reddit suggest it might be 'a bit of a waste' for GPUs like the RTX 4000 or 7000 series, as these cards don't exhibit the same power spikes as older generations, meaning the PSU's enhanced capacitance might not be fully utilized.
Full Specifications
| ASIN | B0CC7R91V7 |
| Brand | be quiet! |
| Series | BN515 |
| Wattage | 850 watts |
| Model Name | BN515 |
| Form Factor | ATX 3.0 |
| Item Weight | 7.77 pounds |
| Manufacturer | be quiet! |
| Connector Type | ATX, PCI Express |
| Cooling Method | active fan-based |
| Output Wattage | 12 Watts |
| Item model number | BN515 |
| Compatible Devices | Computer Systems |
| Product Dimensions | 6.3 x 5.91 x 3.39 inches |
| Power Supply Design | Internal |
| Item Dimensions LxWxH | 6.3 x 5.91 x 3.39 inches |
| Item dimensions L x W x H | 6.3 x 5.91 x 3.39 inches |
What Buyers Say
Users consistently highlight the power supply's exceptionally quiet operation, often noting they 'don't hear my pc at all' even under load. The ATX 3.0 compliance and PCIe 5.0 support are frequently mentioned as key selling points for future-proofing builds. The fully modular cabling is also appreciated for making system assembly and cable routing straightforward. While generally praised, some discussions suggest that the ATX 3.0 features might be overkill for certain newer GPUs that don't exhibit the same power spikes as previous generations.
“Dude, this thing is SILENT, like, I actually had to check if the fan was spinning. My old PSU sounded like a jet engine, this is a game changer for my ears. Plus, all those cables just plug in, no mess. Love it.”
Common Praise
- The Silent Wings 135mm fan keeps the unit virtually inaudible during operation.
- Fully modular cables simplify installation and improve case aesthetics.
- 80 PLUS Platinum efficiency reduces power consumption and heat output.
- ATX 3.0 and PCIe 5.0 readiness provides compatibility with the newest GPUs.
- Japanese 105°C capacitors contribute to long-term stability and reliability.
- The 10-year warranty offers significant peace of mind.
Common Complaints
- Specific, widespread complaints about the BN515 850W model are not readily apparent in user feedback.
Ownership Tips
- The 10-year warranty suggests the manufacturer stands behind the product's long-term durability.
- The use of Japanese 105°C capacitors indicates a focus on sustained performance and reliability over many years of use.
- The 'virtually inaudible' fan design holds up even after extended periods of use, maintaining a quiet system environment.
- The fully modular cables retain their flexibility and ease of connection even after being routed and re-routed multiple times during upgrades.
Frequently Asked Questions
Is this power supply quiet during operation?
Yes, it features a virtually inaudible Silent Wings 135mm fan designed for high airflow intake with minimal noise.
Is it compatible with the latest graphics cards?
Absolutely, it's an ATX 3.0 PSU with full support for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors.
What is its energy efficiency rating?
It boasts an 80 PLUS Platinum efficiency rating, achieving up to 93.8% efficiency.
Are the cables modular?
Yes, it features fully modular cable management for maximum convenience during installation and improved airflow within your PC case.
What kind of warranty does it come with?
be quiet! provides a 10-year manufacturer's warranty for this power supply.
Is 850W enough for a gaming system?
Yes, 850W provides ample power for even demanding gaming rigs, allowing for stable performance with high-end components.
Buying Guide
When you're picking a power supply, don't just look at the wattage number. You need enough power for your components, especially your GPU, but also consider efficiency. A higher '80 PLUS' rating means less wasted electricity and less heat. Modular cables are a huge win for keeping your PC build tidy and improving airflow. And with newer components, ATX 3.0 compliance is becoming important for handling power spikes from modern graphics cards.
Wattage (850W)
This is the total power your PSU can deliver. Think of it like the horsepower of a car; you need enough to move your system's components, especially the CPU and GPU. Too little, and your system won't run stably; too much, and you're paying for unused capacity.
80 PLUS Platinum Efficiency
This rating (Bronze, Silver, Gold, Platinum, Titanium) tells you how much power the PSU converts into usable electricity versus how much is lost as heat. Platinum means at least 89% efficiency at 100% load, saving you money on your electricity bill and generating less heat inside your case, like a fuel-efficient engine.
ATX 3.0 Compliance
This is a newer standard designed for modern, power-hungry GPUs that can have sudden, massive power spikes. An ATX 3.0 PSU can handle these temporary surges without tripping, ensuring your system remains stable, similar to a car's suspension absorbing bumps for a smoother ride.
Alternatives
If this 850W unit is too much, look for lower wattage ATX 3.0 PSUs with 80 PLUS Gold efficiency. If you need more power for extreme builds, search for 1000W+ ATX 3.0 units with Platinum or Titanium efficiency.
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