Just thought I'd share my experience in an effort to remind people that personal experience is not a good yard stick for the overall quality of a line of products.
I purchased a Seasonic X-750 on sale from newegg about a week ago, it arrived a couple days ago, and I was waiting for some components to arrive, which finally showed up today. So, I happily went about pulling all the old stuff from the rig I was upgrading, setting up the new components, preparing my cabling, hooking everything up painstakingly, and finalizing everything in the rig.
Double checked all the connections, pulled out that nice thick 16AWG power cable that came with it, plugged it into my strip, hooked it to the PSU, flipped on the power switch and booted up. Everything worked smooth as butter, and confident of the awesomeness of the 80Plus Gold unit I was happy. I got a call about the time I hit the power switch, and someone had lost their car keys, needed me to look for the spare, so I left my computer running under the load I had built it for while I hunted around for keys. While I was searching I thought I smelled something funny, but I was a little distracted and paid no attention.
About 15 minutes after hooking up the supply, and while looking around for the keys I heard a loud BANG. What the hell...? And my monitor display went black. Oh crap, ran over to my computer and dropped the power, but alas the overpowering smell filling my room pretty much assured me that something was dead. Looking over my components I didn't see any obvious burns or physical problems, until I reached into my case and felt my sweet new X750, it felt like it was 1000 degrees. At this point I was pretty sure that it was the PSU that had died, and I hoped the hell it hadnt taken everything with it.
After the onerous task of undoing all my freshly done cables, I unscrewed the PSU and as soon as I moved it knew it was definitely the PSU, the sound like gravel shifting around in the unit suggested something had blown (probably a cap).
So, 15 minutes of run life before a Seasonic X750 80Plus Gold rated PSU died. If I went solely by my own experience I'd suggest that Seasonics are crap, but we all know better don't we? Basically units will vary even in the best lines, and you need to keep in mind the larger scale of things, expert analysis, mass scale of usage and reports. Your input into this is valuable, but just because you had a unit that died doesn't mean that unit is junk, or if yours works that it is awesome.
SeaSonic X Series Owners Club