Overview
The Chieftec Stealth SPX-1200-FC establishes a high standard for power density and electrical stability, engineered upon a battle-tested Channel Well Technology (CWT) platform. Integrating an LLC half-bridge converter with synchronous rectification and DC-to-DC minor rail conversion, the unit delivers complete ATX 12V 3.1 and PCIe 5.1 compliance. Its internal architecture utilizes exclusively Japanese electrolytic and solid capacitors, ensuring superior ripple suppression and precise voltage regulation on the dedicated 100 A single +12V rail. Equipped with dual native 12V-2×6 connectors, the design natively accommodates demanding next-generation graphics cards and multi-GPU configurations without requiring supplemental adapter splitters.
Physically, the power supply achieves exceptional spatial efficiency by packaging 1200 watts of 80 Plus Platinum power into an ultra-compact 140 mm deep chassis, easing cable management in restricted ATX cases. Cooling is managed by a 135 mm fluid dynamic bearing fan paired with automatic speed control and a selectable semi-passive mode that ensures completely silent operation beneath a 30% load threshold. While acoustic levels rise noticeably to 45.8 dBA at 100% capacity under sustained heavy loads, an exhaustive suite of industrial-grade electrical protections—including over-current, over-voltage, over-temperature, and surge/inrush safeguards—ensures dependable long-term protection for mission-critical builds.
Technical Specifications
| Model Number | SPX-1200-FC |
| Total Continuous Power | 1200 W |
| Form Factor Standard | ATX 12V 3.1 / PCIe 5.1 |
| Efficiency Certification | 80 Plus Platinum |
| Oem Platform | Channel Well Technology (CWT) |
| Internal Topology | LLC Half-Bridge Converter with DC-to-DC Technology |
| Capacitor Specification | 100% Japanese Capacitors |
| Pcie 12v Connectors | Dual native 12V-2x6 connectors |
| Continuous Current 12v | 100 A |
| Continuous Current 5v | 20 A |
| Continuous Current 3v3 | 20 A |
| Minor Rails Combined Capacity | 100 W |
| Standby Rail 5vsb | 3.0 A / 15 W |
| Cooling Fan Diameter | 135 mm |
| Cooling Fan Bearing | Fluid Dynamic Bearing (FDB) |
| Fan Control Profile | Switchable Semi-Passive / Automatic Fan Speed Control (AFC) |
| Chassis Dimensions Mm | 140 x 150 x 86 mm |
| Chassis Weight | 2.86 kg |
| Circuit Protections | OCP, OVP, SCP, OPP, UVP, OTP, SIP |
| Manufacturer Warranty | 5 years |
- Ultra-compact 140 mm chassis depth provides industry-leading power density for a 1200 W unit
- Equipped with dual native PCIe 5.1 12V-2x6 connectors for high-transient graphics cards
- Proven CWT platform using 100% Japanese capacitors and 80 Plus Platinum efficiency
- Zero-RPM semi-passive cooling mode operates completely silent below 30% load
- Acoustic noise ramps up noticeably under full load, reaching 45.8 dBA at 1560 RPM
- No manufacturer-provided official 80 Plus certification specifically rated for 230 V operation