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be quiet! Pure Power 12 550W vs XPG Core Reactor II 850W: Comparison
be quiet! Pure Power 12 550W and XPG Core Reactor II 850W separate most on pcie 8-pin connectors: be quiet! Pure Power 12 550W at 2, XPG Core Reactor II 850W at 6, 67% in favour of XPG Core Reactor II 850W. Wattage splits them by another 35%, again favouring XPG Core Reactor II 850W. They match on 9 other specifications, including 80 plus rating, form factor and single +12v rail. On price, be quiet! Pure Power 12 550W sits at $74.99 against $139.99 for XPG Core Reactor II 850W.
Specs
| Specification |  |  |
|---|---|---|
| Brand | be quiet! | XPG |
| Wattage | 550 W-35% | 850 W |
| 80 PLUS Rating | Gold | Gold |
| ATX Standard | ATX 3.1 | ATX 3.0 |
| Form Factor | ATX | ATX |
| +12V Rail Amperage | 45.8 A | 70.8 A |
| Single +12V Rail | Yes | Yes |
| 12V-2x6 Connectors | 1 | 1 |
| Hold-Up Time | 16.6 ms-2% | 17 ms |
| Zero-RPM Mode | No | No |
| Sleeved Cables | Yes | No |
| PCIe 8-pin Connectors | 2-67% | 6 |
| 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, 3x EPS 4+4, 1x 12+4-pin PCIe (600W), 6x PCIe 6+2-pin, 4x SATA, 4x Molex |
| Fan Size | 120 mm | 120 mm |
| Fan Model / Bearing | 120mm be quiet! fan, rifle bearing | Fluid Dynamic |
| OEM / Platform | HEC | CWT |
| EPS 8-pin Connectors | 1 | 3 |
| SATA Connectors | 5 | 4 |
| Molex Connectors | 1 | 4 |
| Cable Lengths | 24-pin 600mm, max cable length 550mm | 24-pin 640mm, EPS 650/750mm, PCIe 650mm, 12+4-pin 650mm |
| Length | 160 mm | 140 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 | Core Reactor II 850W |
| Typical Price | $74.99 | $139.99 |
| Source URL | https://www.bequiet.com/en/powersupply/5684 | https://hwbusters.com/psus/xpg-core-reactor-ii-850w-psu-review/ |
Price comparison
| Retailer | be quiet! Pure Power 12 550W | XPG Core Reactor II 850W |
|---|---|---|
| Amazon | $74.99 View on Amazon | |
| Newegg | View on Newegg | |
| Consumercarts listing | $139.99 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.
XPG Core Reactor II 850W
8.2 / 10 Expert Rating
Core Reactor II is the first ATX 3.1-certified unit in this batch, so it carries the tightened 12V-2x6 transient spec, a meaningful reassurance for anyone running a power-hungry RTX 50-series card.
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