The CORSAIR RM1200x SHIFT Gold (ATX 3.1, PCIe 5.1) is a 1200 W, fully-modular ATX power supply — ideal for high-end gaming rigs or workstations. It carries 80 PLUS Gold certification (≈ 90 % efficiency), uses premium 105 °C-rated Japanese capacitors for stable power delivery, and supports modern standards (ATX 3.0 / PCIe 5.1) — ready for powerful GPUs. Its standout “SHIFT” design puts all modular connectors on a side panel for easier, cleaner cable management, and a 140 mm fluid-dynamic bearing fan with Zero-RPM mode keeps noise extremely low under light loads.