I'd drop that passive PSU for a Superflower Leadex. They are passive at low load. At high load something else is bound to make more noise.
Possibly, my Seasonic X-650 makes no noise even under load it is one of my quietest components, and is passive for the majority of it's use anyway. My HTPC used a Corsair HX-450w modular and it was never heard unless gaming and then it was the CPU cooler that made the noise. The Superflower is a nice power supply, but it is not any quieter than a Seasonic gold or platinum, passive or with fan. Even a BeQuiet psu is pretty quiet, my son uses a bequiet CPU cooler and power supply, the only thing that makes any noise is the Silverstone 180mm fan on the case.
But if the OP is using a single GPU, the Seasonic is as good as Superflower Leadex in many ways but not overspecced, and is completely silent. And I doubt he would draw enough power from the wall to tax that while gaming on a new Nvidia card.
I would have faith in the Superflower Fanless Platinum, or the Seasonic Fanless Platinum, because they have been build with high end single GPU's in mind, hence the PCI-E connections, though to be honest, I am a little more tempetd by the Superflower below for a silent system. That said, the Superflower is £75 for the Leadex 650w right now, a good price.
YOUR BASKET
1 x
SuperFlower Golden Silent 500W Fanless "80 Plus Platinum" Power Supply - Black £89.99
Total : £99.59 (includes shipping : £8.00).
I have a Phanteks Mini Xl right next to me, Seasonic X-650, Noctua 12S cooler, stock case fans, Gene VI controls the fans. It's quieter than my TJ08B was, I sometimes need to put on the LED or look in the window to see if it's off.
