Asus ROG Strix 550W 80 Plus Gold SMPS

The ASUS ROG Strix 550G is a 550-watt fully modular ATX power supply designed for gaming systems that demand efficient, quiet, and reliable power delivery. Carrying an 80 Plus Gold efficiency certification achieved through the use of premium Japanese capacitors and low RDS MOSFETs, the unit converts mains power with reduced heat generation and lower operating noise compared to standard designs. At the heart of the cooling system is a 135 mm Axial-tech fan — a design originally developed for high-end ROG graphics cards. Its smaller hub allows for longer blades, while an integrated barrier ring concentrates airflow downward for more effective heat removal at lower rotational speeds. The fan runs on dual ball bearings, which are rated to last up to twice as long as traditional sleeve-bearing alternatives, contributing to the unit's long-term reliability. When system load falls below 40% of rated output, the onboard 0dB Technology controller brings the fan to a complete standstill, allowing near-silent operation during light workloads and casual gaming. ROG-branded heatsinks with approximately twice the volume of conventional designs are fitted over critical internal components, helping maintain lower internal temperatures even under sustained load. The result is a power supply that remains whisper-quiet across a wide range of workloads. The fully modular cable system ships with one 24/20-pin motherboard cable (610 mm), two CPU 4+4-pin cables (1000 mm each), two PCIe 6+2-pin cables (675 mm each), two SATA cable sets (810 mm / 860 mm), and one peripheral cable (450 mm). Motherboard, CPU, and PCIe cables include embedded capacitors to reduce voltage ripple at the connector level. Cosmetic flexibility is provided through a magnetic ROG logo badge and included reskin stickers, allowing the visible side of the PSU to be personalised without any permanent modification. Verified Specifications: - Form Factor: ATX 12V - Total Output: 550 W - Efficiency Rating: 80 Plus Gold - Fan Size: 135 mm (Axial-tech, dual ball bearing) - Modular: Fully Modular - AC Input: 100–240 V AC - DC Output Rails: 3.3 V / 5 V / 12 V / -12 V / 5 Vsb - Maximum Load (per rail): 20 A / 20 A / 45 A / 0.3 A / 3 A - Connectors: 1× MB 24-pin, 2× CPU 4+4-pin, 2× PCIe 6+2-pin, 8× SATA, 3× Peripheral - Protection: OPP, OVP, SCP, OCP, OTP - Compliance: RoHS - Dimensions: 160 × 150 × 86 mm - Unit Weight: 1.73 kg - GTIN: 4718017535243 - Warranty: 10 years