be quiet! Pure Power 12 M 850W Modular Power Supply | 80 Plus® Gold | ATX 3.1 | PCIe 5.0 GPUs and 6+2 pin connectors | 12VHPWR Cable Included | Silent 120mm be quiet! Fan - BN505 I 10 Year Warranty
Condition: New
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Availability:
In Stock.
Arrives
Thursday, Dec 4
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Size: 850W
Style: 12 M
Features
- Exceptionally Efficient & Cost-Saving - 80 Plus Gold certified be quiet! 850W PSU with up to 93.0% efficiency, reducing energy waste and operating costs. Generates less heat, prolonging component lifespan and ensuring cooler operation for high-performance PCs.
- Future-Proof with ATX 3.1 & PCIe 5.1 Support - PSU 850W gold computer power supplies designed for next-gen GPUs and gaming systems, featuring PCIe 5. 12V-2x6 600W connector and 4x PCIe 6+2 connectors. Ensures seamless compatibility with current and upcoming graphics cards.
- Unmatched Power Stability & Reliability - Provides 850W continuous power with dual 12V rails for exceptional stability. Handles transient power spikes up to 2000W, delivering uninterrupted performance for demanding gaming and workstation setups.
- Ultra-Quiet Operation with 120mm be quiet! Fan - This 850W PSU gold is silence-optimized cooling with temperature-controlled speed adjustments and airflow-optimized blades, ensuring near-silent performance even under heavy loads. Ideal for noise-conscious users.
- Fully Modular Cables for a Clean Build - Enjoy easy cable management and improved airfloW with fully modular cabling. Removes clutter, enhances cooling efficiency, and simplifies installation for clean and professional PC builds.
Description
Pure Power 12 M 850W is ATX 3.0 compliant and PCIe 5.0 compatible and offers peerless dependability with best-in-class features. Pure Power 12 M 850W offers the best combination of features with outstanding compatibility.
Model Name: BN505
Brand: be quiet!
Compatible Devices: PC
Connector Type: ATX
Output Wattage: 850 Watts
Form Factor: ATX
Wattage: 850 watts
Cooling Method: Air
Item dimensions L x W x H: 5.91 x 3.39 x 6.3 inches
Power Supply Design: Full Modular
Product Dimensions: 5.91 x 3.39 x 6.3 inches
Item Weight: 6.96 pounds
Manufacturer: be quiet!
Item model number: BN505
Date First Available: February 16, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Dec 4
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 750W
Style: 12 M
It's been 12 years since I built myself a new machine, so I felt like I deserved to do it right. After all kinds of research and shopping, I decided on this P/S. (Pure Power 12 M 750W, ATX 3.0, 80 Plus Gold.) I wanted gold, I wanted modular, and I wanted a hundred or two extra watts. I had some trouble figuring out which power connectors went where on the motherboard. (Two 8 pin plugs on the motherboard and one 8 pin connector on the video card.) I called their tech support, it got answered almost immediately by a nice lady who, to my surprise, knew exactly what was going on once I told her which power supply I had! That's not as easy as it sounds, since, all the different Pure Power supplies come with different sets of (modular) cables; she had a lot to remember! We figured it out in no time and she kept me from potentially plugging one of the motherboard 8 pin connectors into the video card and vice versa. ASRock and Pure Power had totally different names for them. One of the most pleasant tech support calls I've ever been on! So, this power supply has been working in this machine for over a month. I've had the machine stressed on purpose, testing with CPU Z and and stressed incidentally, up-scaling (from 480P to 720P) and converting (from MP4 to MKV H265) video files. This was a real pleasure! Files that took my old machine over an hour, took 4-6 minutes on this one! Never any trouble, let alone with the power supply. I tried to find the "knee" in the performance to price ratio curve for all these parts, and if I did it anywhere, I did it with this power supply! The computer has 48 gigabytes (2X24) of G.Skill Ripjaws memory. This machine also has 5 M2 SSD's (One is PCI 5), a SATA 3 SSD, and two 6 terabyte (left over from NAS's) SATA 3 Seagate Iron Wolf HDD's. For video, it's got a used Zotac 1660 6GB GDDR5 card. I'm not a gamer; more of a productivity guy, but this machine's pretty decked out and it's faaast, and there's never any kind of a problem with this power supply! Oh! Yea! No LED's. The motherboard has them and has an LED controller, but I turned them off. The fans' LED's aren't plugged in. But it has two PWM fans for the processor cooler and 6 PWM case fans - the smallest is 120 mm. It boots in under 15 seconds, with all kinds of stuff running, and the cooling fans also crank up as it's booting, as it shuts down, for a second, and once in awhile for no apparent reason. All the other fans are louder (only when it's stressed) than the power supply fan, which I never even hear. I recommend it completely. It's well-built, competent, reliable, (so far; you never know for sure), and quiet, and it has great tech support if you need it. It's beefy and heavy, but not monstrously huge. It's very well priced for a "serious" power supply. Perfect! It's in a Phanteks Enthoo case with plenty of room, so the [modular] wiring is all well laid out inside. I found the included wiring harnesses long enough and sufficient for this build. This power supply finished off a very nice machine! I can't imagine needing a bigger power supply than this unless you've got a gamer-style, several thousand dollar video card or something.
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Reviewed in the United States on May 22, 2024 by Chris C
Size: 750W
Style: 12 M
This PSU is just a joy to work with. It’s thoughtfully designed and well-built. It feels sturdy without being bulky, the cables have braided sheaths, the PCIe connector is doublewide so you can hook up a 2x8pin GPU to two dedicated lines without needing two dedicated cables so there’s less clutter, and both connector orientations are available on the SATA rails for different drive mounting options. Plus, it doesn’t whine like my Corsair CX750M. In fact, it’s whisper quiet. The cables might be a bit short if you have an XL case, but it fits perfectly in the Fractal North. Highly recommended.
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Reviewed in the United States on July 26, 2025 by Kenneth H. Baird
Size: 750W
Style: 13 M (2025)
This power supply is a beast - quiet, cool, and quality. First time buying from Be Quiet! and I'm really impressed. Installation was a breeze and cables are very easy to manage. I wish the cables felt a little more quality because they are quite ugly and are not braided. Personally I feel like braided PSUs feel better and will last longer, but maybe that's just me. It's not a deal breaker, just a pet peeve. The fan doesn't get loud, honestly I can't even tell when my computer is even on sometimes. Keeps my GPU and fans running solid when running games. I'm using an intel 7-13700KF, NVIDIA GeForce RTX 4060 Ti, 32G of Ram and this thing runs great with room to upgrade later on! As for the lifespan, I can't say for sure since I've had it running for about a week, but I've heard good things about this PSU. I've been on a quiet PSU hunt for a good month now, and I can say this is the winner. Really happy with my purchase.
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Reviewed in the United States on July 13, 2025 by LS
Size: 750W
Style: 12 M
This power supply is fully modular, so running cables in your case is very easy. The cables are also all black and very high quality. My completed build definitely looks a lot cleaner and prettier without the ketchup and mustard colored cables. The psu is extremely quiet, and it’s worked flawlessly for over 5 months now. I have yet to try a Be Quiet product that hasn’t been well built and reliable.
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Reviewed in the United States on June 25, 2025 by Aaron