The Chieftec Stealth SPX-1200-FC is a new flagship power supply featuring 1200W capacity and 80 Plus Platinum efficiency. It is built on a CWT platform and meets compliance standards for ATX 3.1 and PCIe 5.1, positioning it for high-power graphics cards.
The unit is designed for high-end systems, offering modularity and utilizing a single 12V rail. It includes two native 12V-2×6 cables, eliminating the need for external adapters when powering top-end GPUs. Premium Japanese capacitors are used throughout the design.
Physical dimensions for the unit are compact, measuring 150mm x 85mm x 140mm. Cooling is handled by a 135mm fluid dynamic bearing fan.
The fan supports a selectable semi-passive mode. Under light loads, such as 50% capacity, the fan stops completely. A ‘Zero Fan’ button is included for managing fan operation during low-demand tasks like browsing or video watching.
Performance testing confirmed strong stability across the rails. Overclockers.ua testing showed the 12V line maintained tight regulation, staying between 12.13V and 12.23V under load.
Hardware Busters listed the unit among their best ATX v3.x PSU selections, confirming its status as a strong performer.
The cable set is extensive, including the 24-pin ATX, two EPS 8-pin connectors, three PCIe 6+2 pin cables, eight SATA, two Molex connectors, and the two native 12V-2×6 cables.
The cables are individually sleeved and described as soft, facilitating easier routing and cable management.
The unit features a design quirk regarding rail capacity. The 3.3V and 5V rails are limited to 20A each, totaling a maximum of 130W. This capacity remains sufficient for modern systems.
The OCClub review pointed out some manufacturing details. The wires are all 18AWG, and the wires are not labeled with their gauge. The packaging consists only of cardboard, lacking a foam tray.
Overall, the Chieftec Stealth SPX-1200-FC is a well-engineered and stable power supply. It provides reliable power delivery and near-silent operation under typical loads.
It balances high performance with quiet operation, offering a solid choice for building high-end systems requiring 1200W delivery.
