ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS be quiet! BN231, 500 W, 100 - 240 V, 550 W, 50 - 60 Hz, 8 A, +12V1,+12V2,+12V3,+12V4,+3.3V,+5V,+5Vsb,-12V be quiet! BN231. Total power: 500 W, AC input voltage: 100 - 240 V, Peak power: 550 W. Motherboard power connector: 20+4 pin ATX, Cabling type: Non-Modular. Purpose: PC, Power supply unit (PSU) form factor: ATX, 80 PLUS certification: 80 PLUS Gold. Product color: Black, Cooling type: Active, Fan diameter: 5.31" (13.5 cm). Compliance certificates: RoHS Because graphics cards and processor manufacturers have an increasing emphasis on keeping the power usage as low as possible, you do not need a lot more than 450 watt for your high-end system. Therefore we take a look at 56 power supplies in this test;... Unfortunately in this test most of the power supplies that we can recommend have a capacity of 550 watt. Between the 350 and 500 watt the offers are a lot less impressive, both in terms of quantity as well as quality. The problem seems to be that for th... AMD is lagging behind a little, but Intel and Nvidia clearly show what the latest trend is: better performance at a lower level of power consumption. As a result, even a 500 watt power supply is more than enough for a PC with a powerful processor and gr...