Do i need a new power supply unit (PSU)??
A 520watt PSU from a quality manufacturer is fine for most builds, unless you are running some kind of SLI rig with a RAID 5 array or water cooling. The fact that the one you have is Arianet, I would purchase a higher quality PSU. I mean, you are gonna spend a lot of money on these new components, why skimp on the part that connects to all of them and can destroy all of them as well. Use this PSU calculator to determine how much power your system will draw, then choose a quality PSU that is rated 30-40% higher than your power requirements. http://extreme.outervision.com/psucalcul… I like Thermaltake, Antec, Cooler Master, Corsair, Sunbeam, Sparkle and Zalman.