A couple of updates:
1/ I managed to hook someone at Asus UK (via
https://www.facebook.com/ASUSROGUK/) to try and get more clarity on the topic of recent PCB layout changes to the Asus Rog Strix GTS 1080 ti boards and potential incompatibility with third party water blocks - I've shared the serial numbers of my cards and they're going to pass those to "HQ" to see if they can determine which rev of the PCB is used. I know the Asus customer support isn't always great but the person I spent some time with (via FB/Messenger) today was really understanding of my situation and is clearly trying to help.
2/ After a bit of a nail biting delay the case rocked up today (should have been before New Year)... and I couldn't resist getting the box open and tearing the case down to check how comfortably the two GTS420's might fit - pictures below.
Some observations on the tear down:
a. It exudes quality, nice solid well made feel to it.
b. Tearing it down is not exactly intuative, some of which I think is related to how solid it is. For example you'd think that you should just be able to snap off the top and the front cover (as you can on some other cases), but I had to get inside to push the retaining clips free, and there's more of those than you might expect. Taking out the front bay to replace it with the fan bracket pretty much requires dismantling the whole case (kind of fine because you won't do that very often).
c. I liked that most (not all) of the screws were retained in some way to help prevent losing them or mixing them up with different ones.
d. I love the fans, compared to the Noctuas in my current gaming rig, they look quite elegent, but the main thing I like about them is that the screw holes have rubber inserts so you're not "tapping" into the solid case when you screw them into position - presumably this also serves to mitigate vibration.
Anyway, here are some pictures, mostly aimed at showing the space available when the case is stripped down (as I'd struggled to find anything like that when I was looking at this case as an option)....
It survived the journey unscathed, and it's as smexy as I hoped
Stripped down and the vital statistics on the front panel recess - perfect fit for the silent wings 3 140mm fans, but not an option for a 420 rad as the recess is too narrow
A couple of pictures to show the kind of space to work with (looks tight but doable) when fitting a Nemesis GTS420 on the inside front and inside top.
All in all I'm pretty chuffed with how things are looking right now.
I'll be leaving the case stripped down for a while now so if anyone needs any measurements/pictures or details please do ping me and I'll try and help as time allows (I suspect that I won't have too much time this coming weekend).