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be quiet! Pure Power 12 550W vs Corsair RM750x: Comparison
be quiet! Pure Power 12 550W and Corsair RM750x separate most on pcie 8-pin connectors: be quiet! Pure Power 12 550W at 2, Corsair RM750x at 3, 33% in favour of Corsair RM750x. Wattage splits them by another 27%, again favouring Corsair RM750x. They match on 10 other specifications, including 80 plus rating, atx standard and form factor. On price, be quiet! Pure Power 12 550W sits at $74.99 against $124.99 for Corsair RM750x.
Specs
| Specification |  |  |
|---|---|---|
| Brand | be quiet! | Corsair |
| Wattage | 550 W-27% | 750 W |
| 80 PLUS Rating | Gold | Gold |
| ATX Standard | ATX 3.1 | ATX 3.1 |
| Form Factor | ATX | ATX |
| +12V Rail Amperage | 45.8 A | 62.5 A |
| Single +12V Rail | Yes | Yes |
| PCIe CEM Standard | PCIe 5.1 | PCIe 5.1 |
| 12V-2x6 Connectors | 1 | 1 |
| Zero-RPM Mode | No | Yes |
| Sleeved Cables | Yes | No |
| PCIe 8-pin Connectors | 2-33% | 3 |
| Connector Count | 1x 24-pin ATX, 1x EPS 4+4, 1x 12V-2x6, 2x PCIe 6+2-pin, 5x SATA, 1x Molex (all fixed) | 1x 24-pin ATX, 2x EPS 4+4, 1x 12V-2x6 (600W), 3x PCIe 6+2-pin, 8x SATA, 3x Molex |
| Fan Size | 120 mm | 140 mm |
| Fan Model / Bearing | 120mm be quiet! fan, rifle bearing | 140mm fluid dynamic bearing, near-silent zero-RPM mode below 40% load |
| OEM / Platform | HEC | CWT |
| EPS 8-pin Connectors | 1 | 2 |
| SATA Connectors | 5 | 8 |
| Molex Connectors | 1 | 3 |
| Cable Lengths | 24-pin 600mm, max cable length 550mm | ATX 610mm, EPS 650mm, PCIe 750mm, SATA 730-850mm |
| Length | 160 mm | 160 mm |
| Colour | Black | Black |
| MTBF | 100000 hours | 100000 hours |
| Modularity | Non-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 550W | RM750x |
| Typical Price | $74.99 | $124.99 |
| Source URL | https://www.bequiet.com/en/powersupply/5684 | https://www.corsair.com/us/en/p/psu/cp-9020285-na/rmx-series-rm750x-fully-modular-power-supply-cp-9020285-na |
Price comparison
| Retailer | be quiet! Pure Power 12 550W | Corsair RM750x |
|---|---|---|
| Amazon | $74.99 View on Amazon | |
| Newegg | View on Newegg | |
| Consumercarts listing | $124.99 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 550W
7.8 / 10 Expert Rating
A quiet, Gold-rated 550W unit that's the right call for mainstream builds that don't need full modularity.
Corsair RM750x
8.3 / 10 Expert Rating
A solid 750W Gold-rated ATX unit for a popular RTX 4070 Ti / RTX 5070-class gaming build, held back only by the usual mid-tier compromises on cabling and OEM sourcing.
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