Product Detail Compliance with the newest Intel standard ATX 12V V2.3 More than 70% efficiency at typical load operation. Green power design to meet Energy Star and Blue Angel requirements. Multiple protection design(OVP/OCP/OPP/SCP). EMI & Noise filter built in design. . The "Cooler Master RS400-PSARJ3-US Elite 400W ATX +12V V2.31 SATA, PCI-E Power Supply Black" is best product for you. We recommended Cooler Master RS400-PSARJ3-US Elite 400W ATX +12V V2.31 SATA, PCI-E Power Supply Black