The RAIDMAX Cobra 500W PSU are designed for worry-free compatibility for your home desktop PC system build or upgrade. With features usually reserved for premium power supplies, it's a great choice for systems where continuous and reliable power delivery and low noise are essential. Features: - Haswell Ready - 80 PLUS Bronze certification guarantees more than 85% efficiency at typical loads - Stable voltage, low-noise levels by thermal controlled 13.5cm fan - Low noise and voltage regulate DC output quality perfectly - A strong single +12V rail for high-end system heavy load configuration provides high stability - The COBRA series offers complete electric protection by OVP, UVP, OPP, and SCP - Compliance with the latest EU ErP Direction - Fully safety certificate with CE, FCC, TUV, and UL