Here I wrote why I built it.
Everything worked the first time I turned it on (the 6th photo), but the cable management (the 2nd photo) and tweaking the fan settings to find the balance between the noise and CPU temperature took a bit of time. Now it's super quiet when idle with the total of 10 fans - I expected CoolerMaster H500m together with fans of Asus Ryujin 360 to be much louder.
Asus AI Overclocking got it to 5-5.1Ghz on all cores without any problem and CPU never got over 70ºC.
Asus ROG Strix 2080 Ti GPU occasionally gets to 79ºC - I am going to install the additional temperature sensors that came with Asus Maximus XI Extreme motherboard and make some fan curve(s) dependent on it - Fan Xpert doesn't use GPU temperature directly.
EDIT: the fan curves for the GPU own fans should be set in Asus GPU Tweek II - getting the fan speeds range from 30% at 45ºC to 65% at 70ºC (it gets really noisy at higher speeds than 65%) lowered the max temperature to 68ºC - it never gets any higher even at 2100MHz.
Here I wrote why I chose it.
Intel is a bit annoying with the wide acceptable quality range of their CPUs, that is if you didn't get a good one - especially for unlocked CPUs. Announcing i9-9900KS only makes it more annoying.
ASUS BIOS previously had "silicon quality" score used in AI Overclocking allowing to understand how good/bad your CPU is from that range, but they've removed it quietly (no idea who asked them). It is obviously still used in AI Overclocking algorithm.
A fairer approach from Intel would be to make the CPU quality transparent and differentiate the pricing by the quality - as with some memory. Or at least create 3 quality buckets with different pricing as with some GPUs - standard, advanced, overclocking (which they did in a way with 9900KS, but it also has some other changes, not only better silicon).
A very good CPU AIO. You need to have ASUS motherboard to monitor system stats - no point having this AIO otherwise.
Armoury crate software that you need to control it is not super stable, and sometimes after cold boot it doesn't show stats until you restart - it is annoying, but ASUS is improving it step by step (Armoury crate is relatively new, previously Live Dash was used to control it).
ASUS AI Overclocking estimates cooler efficiency with a score - I got it from initial 160 (that ASUS says AIO should be) to 190 with a Kryonaut compound. So even though I clearly didn't win silicon lottery, AI Overclocking gets my i9-9900K to 5.1GHz (with 5GHz on all cores above default 4.7Ghz).
Maximus XI Extreme is the best Z390 motherboard with LGA1151 socket that ASUS has (and I think it's simply the best).
The cheaper Maximus XI motherboards have VRMs that according to some users overheat, apparently due to ASUS design decision (https://www.youtube.com/watch?v=bLO-vYjJN-I), but this board has a better VRM. The only viable alternative is Apex (that is the best for overclocking), and it is £100 cheaper so I seriously considered it, but it has two disadvantages compared with Extreme:
- only 2 memory slots. Even though it supports double capacity DIMMs so you can still have 64Gb, these double capacity DIMMs were not available anywhere.
- simpler sound processor, so the features that other ASUS boards have will not be available (whether you need them is another question)
Extreme is E-ATX size, so even with the cases that support it may have more difficulties mounting it (as is the case with CM H500M where this board partially covers cable management windows).
ASUS ROG Strix 2080 Ti (OC) has fantastic performance in all latest games on 3440x1440 monitor - with all settings on Max/Ultra you usually get 60-100 fps, depending on the game (even Shadow of Tomb Rider never get under 60fps and normally it is higher).
Here I wrote why I chose it.
Either all OC variants are that good or I got lucky - my GPU is stable at 2100Mhz and doesn't get any hotter than 68-72ºC (with most games it never goes over 68ºC, with SOTR it is heating up to 72ºC - possibly because it uses ray-tracing cores?).
If you want to have consistent 60fps in all games on 4K monitor (or 100+ fps in most games on 3440x1440) you would need the second linked GPU though.
It is a very good case, probably the best there is for a gaming PC at the moment.
Here I wrote why I chose it.
There are three things that could have been better though:
- cable management windows that are next to the motherboard and allow to hide the cables better are partially covered by E-ATX motherboard. Once the motherboard is installed, it is not possible to pass the cables through, they have to be passed in advance, but that would make the board installation much more difficult. Without doing it though it's quite difficult to install front cable cover (that also has mounts for SSDs). All it would take to avoid this problem would be to move the windows just 0.5-1cm (!) to the front of the case - it wouldn't require a bigger case, just a bit smaller front cable cover. In my case I simply didn't use front cable cover, as I don't have SSDs other than M2 stick plugged into the motherboard and cables look good anyway.
- the PCI card slots window. It would be nice to have rotating slots window to install 2 GPUs vertically, as even though there is one vertical mounting slot, GPU overheats there as it's too close to the glass. You could use CM mounting bracket, but you wouldn't be able to mount the second card in this case (other than in the stock vertical slot where it overheats).
- top fan grill is too narrow even for 120mm fans (see the top photo in the build https://uk.pcpartpicker.com/b/M2dXsY) - airflow would have been better if the grill was wider and only allowed mounting 3x120mm fans. I understand that CM wanted to have more generic grill design in case there are no fans on the top or if you use 140mm fans, but 1) you can only have 2 x 140mm fans, 3 x 120 makes more sense and 2) they could have designed the grill to look good without the fans and still allow more airflow with the fans. I was considering cutting the holes under the fans, but it's probably a micro-optimisation.
The best PSU there is I believe, with 10 years warranty, unless you need more than 1200W. ASUS Thor models are the only PSUs with the indicator showing the current power consumption (it's a gimmick of course:). I've initially bought 850W but then exchanged it to 1200W to allow the second GPU (so some photos show a slightly smaller 850W PSU).
For < £600 it's a fantastic monitor. 3440 x 1440 / 21:9 is the size that gives you more view area in games, also in movies you don't have top and bottom black areas - I definitely prefer watching movies on this monitor rather than on 50" 16:9 TV.
Colours may feel a bit off at times, and indeed when I opened calibration in Windows the greens had to be reduced. If money were no object I would have bought the new PG35VQ for £2600, but under £1000 this one seems to be the best for casual gaming and movies.
Also the cable cover on the back is difficult to detach - be careful with it. ASUS must have done a better job - it just feels cheep that they didn't provide a way to release the clip without nearly breaking it (and I actually broke one clip).