be quiet! Dark Power Pro 12 1200W vs Corsair RM850x Shift (2025)
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Key differences
- •be quiet! Dark Power Pro 12 1200W has higher SATA connectors (16 vs 8)
- •be quiet! Dark Power Pro 12 1200W has higher Wattage (1200 W vs 850 W)
- •Corsair RM850x Shift (2025) has lower PSU length (160 mm vs 200 mm)
Full spec comparison
Spec
be quiet! Dark Power Pro 12 1200W
Corsair RM850x Shift (2025)
Power
Wattage1200 W▲850 W
Efficiency rating80 Plus Titanium80 Plus Gold
ATX versionATX 2.4ATX 3.1
Modular cablingFully modularFully modular
Form factorATXATX
12V rail designSwitchableSingle 12V
Connectors & Build
PCIe / GPU connectors8× 8-pin1× 12V-2x6, 3× 8-pin
CPU power connectors2× 8-pin2× 8-pin
SATA connectors16▲8
Fan size135 mm140 mm
PSU length200 mm160 mm▲
Zero-RPM fan modeYesYes
Warranty10 years10 years