I wouldn't hope for much in terms of silent operation for that one. There seems to be multiple issues with it:
1. GTX 1080 founders edition blower: loud as heck while gaming, and even idle is not really that silent
2. GPU sucks air in through vent holes in a clear plastic. Clear plastic tends to be more rigid, thus it's much more prone to producing vibrrations.
3. AIO watercooler for CPU. At this point we all know that water coolers are more noisy than a big tower air cooler in a well-vented ATX house.
4. I can't see the PSU, but it looks like an actively cooled one, and the site lists it as a
Corsair SFX series one. Again, there are passive PSUs that could power this whole PC without straining, if they have some minimal ventillation in any case that can accept an ATX PSU.
I'm pretty sure my PC has lower noise levels while gaming than this does at idle.
So yeah, might seem like a big deal, but only if you are OK with wearing headphones all the time.