# be quiet! Power Zone 2 850W 80 Plus Platinum

Source: https://www.ranked10.co.uk/tech/best-pc-power-supplies/bequiet-power-zone-2-850w
Ranked #4 in "Best PC Power Supply 2026: 10 Ranked, and the Specs That Don't Add Up": https://www.ranked10.co.uk/tech/best-pc-power-supplies

- Price: £121.94 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.6 from 129 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0FNDG95HF?tag=ranked10-21

The be quiet! Power Zone 2 850W is the fourth entry in this guide and costs £121.94. It is an ATX 3.1 unit rated at 850 Watts of continuous power on a single 12V rail, certified 80 PLUS Platinum and Cybenetics Platinum with efficiency quoted at up to 94.1%, and cooled by a single Pure Wings 3 140mm fan that switches off entirely at low load. The listing reports 4.6 out of 5 from 129 reviews.

Two numbers in that listing are worth a second look. The spec table gives 230 Volts (AC) as the Maximum Input Voltage and the identical 230 Volts (AC) as the Minimum Input Voltage, so what should be a range is filled in twice as a single figure — a figure that does at least line up with the roughly 230V UK mains. The star breakdown tells a different story from the headline count: 81 five-star, 12 four-star, 1 three-star, 3 two-star and 3 one-star ratings add up to 100, not the 129 reviews the page states. The Model Name field also reads "be quiet! Power Zone 850W", dropping the 2 from the product title. Everything below comes from the Amazon listing for this product — the manufacturer's claims and the reviewers' own words, not results from testing we carried out.

## Specification

| Field | Value |
|---|---|
| Price | £121.94 |
| Rating | 4.6 out of 5 from 129 reviews |
| Output wattage | 850 Watts |
| Maximum input voltage (as listed) | 230 Volts (AC) |
| Minimum input voltage (as listed) | 230 Volts (AC) |
| Cooling | Air — 1 fan, Pure Wings 3 140mm, off under low load |
| Model name (as listed) | be quiet! Power Zone 850W |
| Item weight | 3.33 kg |

## Questions people ask

**What input voltage does the be quiet! Power Zone 2 850W accept?**

The listing enters 230 Volts (AC) in both the Maximum Input Voltage and the Minimum Input Voltage fields, so one figure is given rather than a range.

**Does the 4.6 rating come from all 129 reviews?**

The bar chart adds up to 100 ratings — 81 five-star, 12 four-star, 1 three-star, 3 two-star and 3 one-star — while the listing states 129 reviews. The 4.6 figure is what the page shows.

**How much power can the be quiet! Power Zone 2 850W deliver?**

850 Watts of continuous power on one 12V rail, and the listing says it handles power excursions up to double its rated power, so roughly 1,700W for short spikes.

**Which connectors does it have?**

It is an ATX 3.1 unit with native 12V-2x6 for PCIe 5.1 graphics cards, supplied with a 90° angled 12V-2x6 connector, plus three PCIe 6+2-pin connectors and a 20+4 pin system bus connector.

**What efficiency is the be quiet! Power Zone 2 850W rated at?**

It is certified 80 PLUS Platinum and Cybenetics Platinum, with the listing quoting an energy efficiency rating of up to 94.1%.

**How quiet is the be quiet! Power Zone 2 850W?**

The listing says the Pure Winds 3 140mm fan turns off completely under low load and needs a 2-5 minute cooldown afterwards, and describes the unit as suited to very quiet systems.