⚡ Power up silently, perform endlessly.
The be quiet! Straight Power 11 Platinum 850W is a fully modular, high-efficiency power supply delivering up to 94% energy efficiency with 80 PLUS Platinum certification. Equipped with a virtually inaudible Silent Wings 3 135mm fan and premium Japanese capacitors, it ensures stable, reliable power for demanding multi-GPU setups while maintaining whisper-quiet operation. Designed for professionals who value performance, longevity, and a clean build environment.
| ASIN | B083T9STQS |
| Brand | be quiet! |
| Brand Name | be quiet! |
| Compatible Devices | Personal Computer |
| Compatible devices | Personal Computer |
| Connector Types | PCI Express |
| Connector type | PCI Express |
| Cooling Method | Air |
| Customer Reviews | 4.7 out of 5 stars 1,967 Reviews |
| Fan Size | 170 Millimetres |
| Form Factor | ATX |
| Form factor | ATX |
| Global Trade Identification Number | 04260052187395 |
| Item Dimensions | 17 x 15 x 8.6 centimetres |
| Item Weight | 1840 Grams |
| Manufacturer | Be Quiet! |
| Manufacturer Part Number | BN308 |
| Maximum Input Voltage | 230 Volts (AC) |
| Minimum Input Voltage | 100 Volts (AC) |
| Model Name | Capacitor |
| Model Number | BN308 |
| Model name | Capacitor |
| Number of Fans | 1 |
| Output Wattage | 850 |
| Output wattage | 850 |
| Power Supply Design | Internal |
| Product Warranty | 5 Year Manufacturer |
| System Bus Connector Type | 2 Pin |
| Unit Count | 1.0 count |
| Wattage | 850 watts |
A**H
Be Quiet Straight Power 11 1000W - it is REALLY quiet!
Upgraded processor from Ryzen 3600 > 5900X and have an ASUS TUF 3070 OC as the GPU. Had been using a Be Quiet 600W PSU with no problem but it was both only 80+ Bronze and power limiting. I like Corsair and the reviews looked good. Installation was a little bit tricky as the PSU is bigger than many other 1000W but not an issue. It came with 2 less cables than the manual stated. However, no matter how many checks on hardware and software, there was a significant power coil whine. I use a Corsair 275Q quiet case and want a quiet but powerful pc. The HX1000 was very much louder under 400-500W load than the 600W PSU. There was also a dreadful power coil whine that on researching, is quite common. Have replaced with a Be Quiet Straight Power 11 1000W and this is almost completely silent at idle and barely audible at full gaming. Really can't say more than if you want a quiet pc, these PSUs will do the trick.
I**D
Very quiet and outstanding build quality with very good cables
The main thing that stands out to me with this PSU is the incredible build quality, the cables are built amazingly and come in mass! Easy to install, comes with screws too. Barely any noise at all. Would recommend this to anyone looking for an efficient and reliable PSU.
G**M
Best brand in the PSU market
Couldn’t be happier. A great upgrade to my old BeQuiet PSU from 2014. Again this one is super silent and, best of all, absolutely zero coil whine unlike many of the big brands. Throughly recommend BQ every time. Powers my RTX 30 and 12th gen setup brilliantly.
C**C
Fantastic! Solved my Coil Whine
My new 1000w Gigabyte PSU was making a really annoying coil whine noise when scrolling/doing my work. I changed to this LLC 1200w BeQuiet 11 Straight Power PSU and the noise has gone.
P**A
It's quiet...
It delivers on the brand name. Great product.
P**K
Good supply and we'll made, but cables are short.
The ATX cables are definitely on the short side, which given that 1000w supplies are going to be used in high end systems is a little disappointing. I built in a Meshify 2 CL and the ATX cables in particular were too short to go behind the motherboard and back out, instead requiring that I take the ugly route through the front side. If you want to use this in a larger case and properly cable manage, consider ATX and 8 pin extension cables.
V**.
Very quiet
Very happy
M**S
Quiet and no issues
The headline says it all
Trustpilot
2 weeks ago
2 days ago