How well do they go, and how long do they take? My Liberty 620 gave up the magic smoke sometime tonight. I came home to a computer that was turned off, and when I hit the power button (after a thorough visual inspection), a nice flash and "bang" from the PSU. I'm supposed to have a 3yr warranty, so we'll see how it goes. AT the first hint of problems, I'll order the Corsair HX620 (would the 500 watt one be sufficient- the left rig in my sig?) for this rig and keep the Liberty as a backup or sell it.