be quiet! Straight Power 11 BN284
 | Outdated Product Hi-End power supply with a rated power of 850 W with advanced circuitry based on heat-resistant Japanese capacitors, a modular cable system and a virtually silent cooling system. It belongs to the upper price range and is part of the Straight Power line of advanced power supplies, which are distinguished by high quality performance and low noise levels. The power supply is certified according to the “80 PLUS GOLD” standard and is equipped with all modern protection mechanisms, so it can be trusted to power powerful and expensive components of the Core i9 + GeForce RTX 4080 level. The declared efficiency of the power supply reaches 93%. be quiet! Straight Power 11 has 4 independent power lines (12 V), which makes it as reliable as possible. The circuitry is built using Japanese-made capacit...ors, a half-bridge LLC circuit and DC-DC converters, which are characterized by excellent stability and reliability even when the components are very hot. The main 12-volt line is capable of providing almost 100% of the total power of the device. Active cooling of the power supply components is provided by a 135 mm Silent Wings 3 fan on a hydrodynamic bearing. It automatically changes rotation speed based on device temperature, and fan blades optimized for better airflow reduce turbulence, resulting in noise levels of just 25 dB above 90% load. And with a decrease in overall energy consumption, the fan blades rustle barely noticeably, without causing any discomfort. An important feature of the model is the use of boards with wireless connections of components - the absence of unnecessary wiring has a positive effect on cooling. Fully modular wiring makes it possible not to limit yourself in matters of cable management, especially when it comes to a transparent or translucent case, the owner of which took care of the interior decoration and lighting. Built-in protection against overcurrent and power, overvoltage and undervoltage, short circuit and overheating, as well as an official five-year warranty from the manufacturer, allows you to look into the future with optimism, without particularly worrying about the safety of PC components. |
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1000 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 12, Molex 4, ATX, modular, Efficiency 90 %, certificate 80+ Gold, warranty 10 years
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1000 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 11, Molex 4, ATX, modular, Efficiency 90 %, certificate 80+ Gold, warranty 7 years
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750 W, 24+8+8(4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 14, Molex 3, ATX, modular, Efficiency 92 %, certificate 80+ Platinum, warranty 10 years
850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 8, Molex 4, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Platinum, warranty 10 years
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Hi-End power supply with a rated power of 850 W with advanced circuitry based on heat-resistant Japanese capacitors, a modular cable system and a virtually silent cooling system. It belongs to the upper price range and is part of the Straight Power line of advanced power supplies, which are distinguished by high quality performance and low noise levels. The power supply is certified according to the “80 PLUS GOLD” standard and is equipped with all modern protection mechanisms, so it can be trusted to power powerful and expensive components of the Core i9 + GeForce RTX 4080 level.
The declared efficiency of the power supply reaches 93%. be quiet! Straight Power 11 has 4 independent power lines (12 V), which makes it as reliable as possible. The circuitry is built using Japanese-made capacitors, a half-bridge LLC circuit and DC-DC converters, which are characterized by excellent stability and reliability even when the components are very hot. The main 12-volt line is capable of providing almost 100% of the total power of the device.
Active cooling of the power supply components is provided by a 135 mm Silent Wings 3 fan on a hydrodynamic bearing. It automatically changes rotation speed based on device temperature, and fan blades optimized for better airflow reduce turbulence, resulting in noise levels of just 25 dB above 90% load. And with a decrease in overall energy consumption, the fan blades rustle barely noticeably, without causing any discomfort.
An important feature of the model is the use of boards with wireless connections of components - the absence of unnecessary wiring has a positive effect on cooling. Fully modular wiring makes it possible not to limit yourself in matters of cable management, especially when it comes to a transparent or translucent case, the owner of which took care of the interior decoration and lighting. Built-in protection against overcurrent and power, overvoltage and undervoltage, short circuit and overheating, as well as an official five-year warranty from the manufacturer, allows you to look into the future with optimism, without particularly worrying about the safety of PC components.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog be quiet! 2026 - new arrivals, bestsellers, and the most relevant models be quiet!.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog be quiet! 2026 - new arrivals, bestsellers, and the most relevant models be quiet!.
Series be quiet! Straight Power (high efficiency)Compare using chart →
1200 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 2 x 16 pin, SATA 9, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Platinum, warranty 10 years
850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 9, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Platinum, warranty 10 years
750 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 9, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Platinum, warranty 10 years
450 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 8, Molex 3, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 5 years
1000 W, 24+8+8(4+4) pin, 6 x 6+2 pin, SATA 11, Molex 4, ATX, modular, Efficiency 93 %, mining, certificate 80+ Gold, warranty 5 years
650 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 9, Molex 3, ATX, modular, Efficiency 94 %, certificate 80+ Platinum, warranty 5 years
Model overview based on user reviews
The "be quiet! Straight Power 11" power supply unit is highly praised for its exceptional silence and quality build. Users appreciate its fully modular design and long cables, allowing for flexible and tidy installations. Despite some minor issues like stiff wires and unclear instructions, the PSU is considered reliable, with stable voltage lines under load. However, there are isolated reports of defective units and unexpected shutdowns, though these were swiftly addressed by the service center with replacements. Overall, the PSU is valued for its quiet operation and durability, making it a recommended choice for those seeking a high-quality power supply.
Pros
Cons
0 0 3 2 |
Bought this power supply hoping for quiet operation. Upon connection, a squeal appeared. Got a defective unit, was very surprised and upset by this. The next day, took it back to the store. - Truly quiet operation - Modular - Long cables - Stiff wires - Loud sound of the switch when turning the computer on or off.  Viktor: use be quiet! BN282 less than month |
Ordered on F.ua. 750 watts[283]. Everything is fine, it came new in sealed packaging via NP. Quiet, the relay click is inaudible in the room (it is very quiet on its own). Haven't given it a proper load yet, don't have the means, it's in a PC with a load up to 350 watts. The 12V, 5V, and 3V lines do not sag, the values are stable with a margin. I'll add a comment later after installing in a new computer. Quality, modularity+-, it weighs normally :)), Completeness+-, length and number of cables. Power around 700 watts. I was ready to pay this money for it, the most important part in a PC. The instructions are not clear. All the sockets are marked in their own way, but there is no clear information on them in the instructions, I had to google ... in fact, nothing complicated. Why the metal braid is unclear, tight. K10: use be quiet! BN283 less than month |
Quality, silence and affordable price Virtually no, the only harsh cable sheath, and everything is on top i recommend it should buy |
3 out of 5 user review(s) shown
2 more user review(s)
be quiet! Straight Power 11 configurations
| Price for be quiet! Straight Power 11 | ||||
|---|---|---|---|---|
 | be quiet! Straight Power 11 BN280 | from £354.74 | 1 offer | |
| be quiet! Straight Power 11 BN285 | from £259.99 | 1 offer | |
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