Hello, I am considering creating a custom system. I am not sure about the power supply needs. The following is a list of hardware that I am planning on using: ECS Black Series A785GM-M AM3 AMD 785G HDMI Micro ATX AMD Motherboard - Retail http://www.newegg.com/Pro... AMD Phenom II X4 955 Black Edition Deneb 3.2GHz http://www.newegg.com/Pro... OCZ Gold 4GB (2 x 2GB) Ram http://www.newegg.com/Pro... Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders NZXT LEXA S LEXS - 001BK Black Steel ATX Mid Tower Computer Case http://www.newegg.com/Pro... SAPPHIRE 100284L Radeon HD 5750 http://www.newegg.com/Pro... Western Digital Caviar Blue WD5000AAKB 500GB 7200 RPM http://www.newegg.com/Pro... Sony Optiarc Black 24X DVD+R 8X DVD+RW 12X DVD+R D http://www.newegg.com/Pro... And the power supply is: LOGISYS Computer PS550ABK 550Watts ATX12V Power Supply With SATA and 20/24 Pin connectors. http://www.newegg.com/Pro...