Your system will only pull under 400W max. Your GPU being 230W max I would recommend ours or another ENP-7660B that has 2 separate PCI-E cable runs, one for each GPU connector rather than daisy chained. Better load balance with 6 12V circuits and with less risk than running 2.
Our replenishment stock landing tomorrow, but by the time it's unloaded, devanned, and delivered to us we will be into the start of next year for shipping.
Stock fan is Yate Loon and quiet, you won't need a Noctua and I would recommend against it.
We have looked at specs for some of these psu's and it's life matches the warm temp mtbf figures 10-15k hrs iirc. ENP-7660B by comparison is greater than 100,000hrs with the fan at 70,000hrs. All down to quality of components as well as design.
It's not always applicable but certainly you experience does advertise the buy cheap buy twice notion to some degree.
