Perhaps the extra efficiency will really make it worth the upgrade if the system is going to sit around ~30w idle draw most of the time. The fanless Seasonic X-400 seems to be at the same price as the X-560 now, perhaps that would be the best choice? Lower max rating should mean slightly better efficiency at super low draw, right?
The difference in low power efficiency between the X400 and X560 will be small. I measured 70% & 80% at 20W & 40W on the X400... compared to 65% and 77% for X650. Just 2W AC. But... at these lower power levels, the SII-380 was nearly as good as the X650 (within a watt). IMO, a watt or two really isn't worth sweating about; the main advantages of the X series is...
- the fan does not spin <200W, so except for possible electronic noise (which is generally very low in my experience w/ the X series), they're effectively silent most of the time.
- the modular cabling is great
- high efficiency at higher loads means less power draw and lower heat when it matters most.
On the other hand, though the SII-380 was undeniably noisier than any of the X series, its noise was measured in a live room, before SPCR's anechoic chamber was built. That 21 dBA/1m SPL translates to probably 18 dBA or so in the chamber. That's a guess. (Note to self: Check at least start/default noise levels on pre-anechoic chamber PSUs...)
The reason I chose the Intel SSD is strictly for reliability. Given its premium price tag I'm not sure that it will end up in the final build, but in this application I value the reliability over extra performance of other models.
Totally agreed w/ you there. Not only in this app, but just about any. Who cares that the zoomcar does 0-60 in 4.8s if it starts up only half the time?