Thermaltake Smart BX3 750W 80 Plus Bronze ATX 3.1 Power Supply

The Thermaltake Smart BX3 750W is a non-modular ATX 3.1 power supply designed for budget-conscious PC builders who need dependable power delivery without compromising on modern compatibility standards. Built to comply with the Intel ATX 3.1 specification, it supports up to 200% power excursion headroom, meets the updated power-supply timing standards, and achieves at least 60% efficiency at low load — requirements that older ATX 2.x units do not meet. This makes the Smart BX3 750W a forward-compatible foundation for current and upcoming desktop platforms. At the heart of its power topology is a high-amperage single +12V rail paired with a DC-to-DC conversion circuit, which delivers tighter voltage regulation across the +3.3V and +5V rails compared to traditional group-regulated designs. The 80 Plus Bronze certification confirms efficiency of up to 85% under typical load conditions, helping to reduce heat output and long-term energy costs relative to uncertified units. Thermal management is handled by a 120mm fluid bearing fan that runs quietly under light workloads. The integrated Smart Zero Fan mode keeps the fan stationary until the power supply reaches a defined load threshold, eliminating fan noise during low-demand tasks such as desktop use, media playback, or light browsing. The main capacitor is rated to 105°C (221°F), a specification associated with improved longevity and stable operation over multi-year use. The non-modular cable layout uses soft, flat black cables intended to simplify routing inside compact and mid-tower cases. The Smart BX3 750W is also optimised for Intel C6/C7 low-power processor states, allowing compatible CPUs to reach their deepest sleep modes for maximum energy saving at idle. Verifiable Specifications: - Wattage: 750W continuous - ATX Standard: ATX 3.1 - Efficiency Rating: 80 Plus Bronze (up to 85% efficiency) - Modular: No (non-modular) - Fan: 120mm fluid bearing with Smart Zero Fan mode - Main Capacitor Rating: 105°C / 221°F - +12V Architecture: Single rail, DC-to-DC design - SATA Connectors: 4 - Peripheral (4-pin Molex) Connectors: 4 - PCIe Connectors (6+2-pin): 2 - Warranty: 5 years - SKU: PS-SPD-0750NNFABD-3