Hi,\r\n\r\nI'm pretty new to this building a PC from scratch stuff and I put together my first system about 7 months ago. \r\n\r\nHere are my specs:\r\nAMD Athlon 64 3800+ @ 2.4 GHZ Cooled with a (Zalman CNPS-7000B Aluminium/Copper version)\r\n4x512mb Kingston Hyper X RAM\r\nATI Radeon X700 Pro PCI-E\r\nSeagate 300GB SATA HDD\r\nWestern Digital 200GB IDE HDD\r\nSony DRU-810A DVD Recorder\r\nTurtle Beach Montego DDL 7.1 Sound Card\r\nTurtle Beach Video Advantage PCI video capture card\r\n3 LED 80mm case fans\r\n1 LED 120mm case fan\r\n1 92mm case fan\r\nAntec Full Tower Case\r\n\r\nI use to power my system with an Antec Neopower 550 but after three months it caused random shutdowns due to low amps on the 5v and 3.3v rails (at the time I only had 4 case fans, 2 DVD Burners, and no soundcard). I replaced it with an Antec Smartpower 2.0 500 watt and it worked without problems until 6 months later. The PSU would work but I could hear a buzzing noise even when the computer was off and the power cord was plugged in. I RMA'd it and got a new one from Antec. \r\n\r\nMy question is should I continue sticking with my new Smartpower 2.0 500 watt PSU or should I purchase a different one because of the history I had with the original one?\r\n\r\nIf I should consider gettting a new PSU which one should I get?\r\n\r\nI keep everything at Stock speed and do not overclock.\r\n\r\nThanks.