This article covers Be Quiet BN301 System Power 9 500W CM モジュラー 80 PLUS ブロンズ 電源 ブラック.

Overview

The be quiet! System Power 9 500W CM is an entry-level power supply from the German manufacturer known for its quiet operation. Rated at 500W with 80 PLUS Bronze certification (up to 89% efficiency), it adopts a semi-modular cable design that lets you connect only the cables you need, improving airflow inside the case. This PSU features dual strong 12V rails for stable power delivery, DC-DC converter technology for tight voltage regulation, and compliance with Intel C6/C7 power states, ErP, and Energy Star 6.1 guidelines. A temperature-controlled 120mm fan adjusts speed based on load, balancing noise and cooling. Priced in the entry-level segment, the System Power 9 500W CM offers practical features like semi-modular cabling and low standby power draw (under 0.15W), making it an excellent choice for first-time builders, office PCs, and low-power configurations.

Compatibility Guide

Form factor: Standard ATX, fits most mid-tower and full-tower cases. Connectors: 24-pin main, 4+4-pin CPU, 2x 6+2-pin PCIe, SATA, Molex (4-pin), and FDD connectors. Platform support: Compatible with latest Intel and AMD processors; supports Intel C6/C7 states for Haswell and newer CPUs. Multi-GPU: Two PCIe connectors allow 2-way GPU setups, but 500W capacity limits this to low-power cards. * Cabling: Semi-modular with fixed 24-pin and CPU cables; flat cables for easy routing.

Product Info

Released around 2019, this model remains a popular choice in the entry-level segment. It combines semi-modular design, 80 PLUS Bronze efficiency, and DC-DC conversion—features often found in mid-range units. Warranty is typically 3 years (confirm with retailer). Available at and major PC parts stores. Key specs: 500W rated, 80 PLUS Bronze (89% max efficiency), dual +12V rails (18A each), DC-DC converter, 120mm temperature-controlled fan, <0.15W standby power.

Best Use Cases

First-time PC builder: Semi-modular cables simplify wiring; 500W is sufficient for entry-level graphics cards like GeForce RTX 3050 or Radeon RX 6400. Office / productivity PC: Low power draw and quiet operation suit noise-sensitive environments. Secondary PC or home server: Reliable 24/7 operation with low standby power; avoid high-end GPUs or many HDDs. Budget gaming: Pairs well with mid-range GPUs (up to RTX 4060) for 1080p eSports titles.

Things to Consider

500W is insufficient for high-end GPUs (RTX 4070+) or overclocked builds; consider 650W+ for those. Semi-modular means the 24-pin and CPU cables are fixed; cable length may be tight for large cases with behind-the-motherboard routing. 80 PLUS Bronze is standard for entry-level; Gold or Platinum units save more electricity over time. Competitors include Corsair CX550M and Cooler Master MWE 550 Bronze; be quiet! excels in noise but compare connectors and capacity. ## FAQ
Q: Can this PSU run a GeForce RTX 3060 Ti? A: The recommended PSU for RTX 3060 Ti is 600W, so 500W is borderline. Peak power spikes may cause instability; a 650W unit is safer. Q: What's the difference between semi-modular and fully modular? A: Semi-modular has essential cables (24-pin, CPU) fixed; others are detachable. Fully modular allows all cables to be removed. The System Power 9 CM is semi-modular, balancing cost and convenience. Q: Does this PSU support ATX 3.0? A: No, it's based on ATX 2.4. It lacks the 12VHPWR connector for RTX 40-series cards. For those, consider an ATX 3.0 compliant unit.

Product Disclosure (Amazon)

  • Manufacturer: be quiet!
  • Seller: Reg shop
  • Fulfilled by: Reg shop
  • ASIN: B07V8RNCH6
  • Note: This article covers a manufacturer-made product based on Amazon listing details.