The product comes with BSMI, CB, CCC, CE, cTUVus, CU, FCC, RCM, TÜV, UKCA certifications and OTP (over-temperature protection), OCP (over current protection), OPP (over-power protection), SCP (short circuit protection), OVP (over Voltage protection), UVP (Under Voltage protection), SIP (Surge & Inrush Protection) features.

The retail package comes with the usual be quiet! design, all needed logos are in front indicating the product's main features. The product will be found at the retail price of $134.90 / €139.90 / £138.99, with 10 years of warranty.

Opening the package unveils its contents

The PSU dimensions are (without cables) 160 x 150 x 86 (L x W x D), (mm), and its weight is 1.85 kg.

The used fan at the Pure Power 12M series comes from being quiet! and according to the specifications is a specially silence-optimized fan with 120mm size, rifle bearing technology, and a 4-pole motor fan. Its maximum speed is 2000rpm and even at 100% load the sound pressure (noise) it produces reaches 25.7dB(A), which is very low.

The back of the PSU includes a honeycomb design to help transfer the produced internal heat from the PSU.

The retail package includes Philips screws, several cable ties, and a printed user manual in six languages (DE, EN, ES, FR, PL, RU).

The main connectors of the PSU are displayed below

The PSU is designed with modular cables in mind and has two types a sleeved cable (20+4pin) and the rest are flat cable. The maximum cable length is 95cm (SATA+PATA cables), while the 20+4 motherboard cable is 55cm, which should be enough even for big-sized cases. Below is a chart with all included cables and their corresponding lengths. We would like to have a slightly longer distance between SATA and PATA cables of 200mm.

Included you will find 8 cables as follows and note there isn't any floppy cable (who uses it anyway...).

• 1x ATX-Motherboard (20+4-pin)
• 1x P4+4 (CPU)
• 1x P8 (CPU)
• 1x 600Watt 12VHPWR cable
• 4x PCI-e 6+2-pin (GPU)
• 6x SATA
• 2x PATA

The Pure Power 12M series are rated 80Plus Gold, meaning you should expect 89% efficiency at full 230V, and according to the be quiet! measurements the 850W variant reaches 91.2%, which covers this standard.

The output total 850W is separated into two 12V rails, which according to the be quiet! should cover you even in high loads, like using the latest Intel/AMD processors with the Nvidia RTX4000 series and AMD RX7000 series. The specifications indicate

• +3.3V (A) => 22Α
• +5V (A) => 22Α
• +12V1 (A) => 40Α
• +12V2 (A) => 36Α
• -12V (A) => 0.3Α
• +5Vsb (A) => 3Α

The max. combined power 12V is 850W, while the max. combined power 3.3V+ 5V is 120watt. be quiet! offers an online psu calculator, which can help you estimate, which power supply you want for your system. For example, building a new system with somewhat medium-power computer parts can take up to 630 watts, in that case, the Pure Power 12M 850 watts is enough even for future upgrades. It's advised to use a power supply with up to 70-80% total load, in order not to stretch the system to its limits and therefore the power supply as well.

• CPU: Ryzen 5 7600
• GPU: Radeon RX 6700 XT
• Drives: S-ATA 2x, P-ATA 0x
• M.2 SSD: 2x
• RAM: 2x
• Fans: 4x
• Water cooling: 1x Pump, 3x Fan
• USB 3.1 Gen. 2: Yes
• Overclocked: CPU: 10%, GPU: 0%

The included cable for ATX3.0 enabled graphic cards is rated up to 600 watts, meaning it can support up to RTX4090 graphics cards, even though we feel that RTX4090 cards should have at least 1000 watts PSU to play at the safe side.