This build was completed in June actually and I totally forgot to post it here until today. I post some details in Chiphell, though you may need to use Google translate to read it. (https://www.chiphell.com/thread-1869121-1-1.html)
Note: all the CPU temperature below will be the Tdie temp.
2700x is a bit hot in this case unless you use it with default core speed, which is 3.7G all core without PBO. I use a graphite version copper C7 plus a 2.5W A9x14 from noctua. The retail A9x14 has the maxium speed of 2100prm(or2200 I can't remember) while the 2.5W version only from L9i or L9a can work at 2500rpm. So now the fan speed is comparable to stock C7 fan, and much quieter. I bought the Cu C7 together with non-retail A9x14 from taobao in May and the seller has already painted it with graphite as I wish.
BTW, 92mm AIO cannot be installed if you use 1080Ti FTW3. I think 92mm AIO can only be used when the video card is not that high(long) as a FTW3.
The EVGA 1080ti FTW3 is actually longer than the recommended GPU length, but still can be fit in the case. To make the installation easier, I have to remove the screws on the riser and plug the card into the PCI connector first.
About Case fan:
I installed a A9 (25mm) at the bottom of the PSU and used a LNA cable to minimize its sound. It won't help too much on CPU temp but help a bit on the video card side(FTW3 is 302mm long!). I also bought two Asaka 80x80x10mm fans, but I failed to install these two. I know some people successfully installed them to the top and bottom of the mobo, but when I do this, I found it is so difficult to put them into the correct location steadily. So I give it up....
I installed one 2TB SATA SSD in the front as a storage disk for personal stuff, one 512G 970Pro for OS and one 512G 970Evo for games. The temperature result is telling me that 970evo is hotter than 970pro so it is recommended to install the 970 evo to the front M.2 slot. The rear M.2 slot can be cooled down by a 1mm thermal pad and several 1mm copper plate so that the M.2 controller and memory can touch the case skeleton to maintain an acceptable temperature. Without any cooling methods, rear M.2(970evo) can be as hot as 110 ℃ under benchmark.
About mobo and memory:
Currently I'm using Gskill 3200CL14 on my x470-i. It is a Samsung Bdie memory listed on mobo's QVL and works fine at DOCP. Before that, I bought a Gskill 3600CL17 which is not on the QVL, and it coundn't reach its rated speed 3600CL17. Actually, it couldn't reach any better than 3200CL18 before I returned it to Amazon. But the memory sticks rated at 3200CL14 works well at 3200CL14. So now I learned to buy memory sticks on the QVL to avoid this situation....
About PSU cables:
It is highly recommended to get some custom cables rather than the official cable. Original stock cable is extreamly hard: not only the cable but also the plug. I bought these cables from Taobao in May together with the copper C7. You can easily find the cable length on the internet. The space below the PSU is so small that you won't want to waste time on cable management. Trust me.
I didn't want to run FPU tests in AIDA64 since I know it is an unpractical test and making no sense to do heavy works like that in a ITX case. I plotted some simple graphs shown together with photos based on the Witcher 3, GTAol and Cinebench15 to have an idea about the temperature of 2700x and C7.
Room temperature is 23 degree.
Recently I change the BIOS setting and the CPU is working at 3.9G@1.225V so that CPU temp in game varies between 65℃ to 75℃ as you can see from graphs. The 2700x can work at 4G@1.275V and pass one CR15 as it is reaching 100 degree, and in some heavy CPU load game like battlefield 5 beta it may still stop responding. I also tried 4G@1.25V and it won't pass one single CR15. The computer won't boot with any voltage lower than 1.25V as it has been limited by the cooler. PBO also works well and 2700x automatically boosts to 4.2G for a few seconds and work constantly at 3.8-3.9G depends onload. I upload the temp performance after each CR15 cycle.
CR15 1Cycle 80degree
CR15 2Cycle 83degree
CR15 3Cycle 85degree
CR15 4Cycle 87degree
CR15 5Cycle 90degree
CR15 6Cycle 93degree
In practice, CPU will not have this high stress so I'm not really concern about its temp and seems like this voltage is steady enough for Cu C7 wind cooling.
Meanwhile, the CPU fan is pretty noisy if the default fan setting is used in BIOS. I use a pretty flat curve when temp is below 65 and speed starts to rise after 65. Make sure you find a good curve slope so that you won't hear the noisy fan every time you open Chrome.
GPU temperature is really good. With the original thermal compound, maximum ingame temperature is 78℃, which is acceptable.
Shadow of Tomb Raider: CPU is running at 65℃ most of time , occasionally jump to 75℃. GPU is running at 73-75 constantly.
I only run the TimeSpy twice to test the performance of the riser. The PCIe extension cable almost has no effect to benchmark results. What affect score more significantly is GPU is working at PCIex8 due to a second M.2 SSD. Graphic score was about 10500 before a second M.2 was installed and now dropped to ~9950.
2700x also works normal and passed the timespy extreme stress test, which will loop the bechmark for 30 times. Its CR15 score was 1753 at 3.9GHz.