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be quiet! Pure Power 12 M 850W vs Corsair RM1200x SHIFT: Comparison
be quiet! Pure Power 12 M 850W and Corsair RM1200x SHIFT separate most on pcie 8-pin connectors: be quiet! Pure Power 12 M 850W at 4, Corsair RM1200x SHIFT at 6, 33% in favour of Corsair RM1200x SHIFT. Wattage splits them by another 29%, again favouring Corsair RM1200x SHIFT. They match on 8 other specifications, including 80 plus rating, form factor and 12v-2x6 connectors. On price, be quiet! Pure Power 12 M 850W sits at $129.99 against $249.99 for Corsair RM1200x SHIFT.
Specs
| Specification |  |  |
|---|---|---|
| Brand | be quiet! | Corsair |
| Wattage | 850 W-29% | 1200 W |
| 80 PLUS Rating | Gold | Gold |
| ATX Standard | ATX 3.0 | ATX 3.1 |
| Form Factor | ATX | ATX |
| Single +12V Rail | No | Yes |
| Cybenetics Efficiency | Platinum | Gold |
| Cybenetics Noise | A- | A |
| PCIe CEM Standard | PCIe 5.0 | PCIe 5.1 |
| 12V-2x6 Connectors | 1 | 1 |
| Zero-RPM Mode | No | Yes |
| Sleeved Cables | Yes | No |
| PCIe 8-pin Connectors | 4-33% | 6 |
| Connector Count | 1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 1x 12VHPWR (600W), 4x PCIe 6+2-pin, 6x SATA, 2x Molex | 1x 24-pin ATX (side-mount), 2x EPS 4+4 (side-mount), 1x 12V-2x6 (600W, side-mount), 6x PCIe 6+2-pin, 16x SATA, 8x Molex |
| Fan Size | 120 mm | 140 mm |
| Fan Model / Bearing | 120mm rifle bearing (BQ QF2-12025-HS) | 140mm fluid dynamic bearing, zero-RPM mode |
| OEM / Platform | HEC | Great Wall/CWT |
| EPS 8-pin Connectors | 2 | 2 |
| SATA Connectors | 6 | 16 |
| Molex Connectors | 2 | 8 |
| Cable Lengths | 24-pin 550mm, EPS 600mm, 12VHPWR 600mm, PCIe 500+150mm, SATA 500+150+150+150mm | ATX 610mm, EPS 650mm, PCIe 750mm, SATA 730-850mm |
| Length | 160 mm | 180 mm |
| Colour | Black | Black |
| MTBF | 100000 hours | 100000 hours |
| Modularity | Fully Modular | Fully Modular |
| Protections | OTP, OCP, OPP, SCP, OVP, UVP, SIP | OCP, OVP, OPP, SCP, OTP, UVP |
| Warranty | 10 years | 10 years |
| Model | Pure Power 12 M 850W | RM1200x SHIFT |
| Typical Price | $129.99 | $249.99 |
| Source URL | https://www.bequiet.com/en/powersupply/4072 | https://www.corsair.com/us/en/p/psu/cp-9020254-na/rm1200x-shift-80-plus-gold-fully-modular-atx-power-supply-cp-9020254-na |
Price comparison
| Retailer | be quiet! Pure Power 12 M 850W | Corsair RM1200x SHIFT |
|---|---|---|
| Consumercarts listing | $129.99 View on Consumercarts listing | $249.99 View on Consumercarts listing |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
be quiet! Pure Power 12 M 850W
8.2 / 10 Expert Rating
The 850W Pure Power 12 M tops out the modular M-series, giving budget-focused builders a native 12V-2x6 connector and Gold efficiency without stepping up to the pricier Straight Power line.
Corsair RM1200x SHIFT
8.3 / 10 Expert Rating
A solid 1200W Gold-rated ATX unit for a workstation or multi-GPU build with serious headroom, held back only by the usual mid-tier compromises on cabling and OEM sourcing.
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