On the back of the monitor, you will see Rev and the date. Mine is Rev00 01 2020.
Hi there
REV00
Manufactured 05/2020
I wouldn't say my room is totally silent - I have a pc with a cooler and a small nas to my left so I do hear a constant fan sound from that but its pretty normal for a PC sound.
If I press my ear on top of the monitor you can hear a fan going but I've never heard anything like some of the ones I've seen videos of. If I literally take my iPhone and put it in video mode then REST it on top of the monitor the mic is very sensitive so picks up a fan sound but my ears don't have that sort of feature so for me so far I seriously wouldn't have known about the Gsync fan unless I did what I did where I ended up on reddit for hours AFTER I had ordered the monitor as the reviews from quite well known outlets didn't even mention it. I'm sure its highly likely there can be faulty versions of this for sure as its just normality with technology build on masse.
Obviously in 3 days time I could suddenly have some issue but that's what the warranty is for.
Really impressed with the brightness on this compared to the x34 though - really pops and I have it quite near my LG OLED!
PS I have kept my x34 in the box just incase!