thx
thenightflyer
you answered for many of my questions:
1, and 4: it is not a priority and as you said many people did so for me it was not the biggest problem of this rig (the problem was the SM 961 + 2699v4 and the 2 titan X fully ok on sierra and it is)
2: it is strange, but it was ok one time during 2 hours i was able to enter in the menu and choose upgrade, after rebooting: finito! But it is only esthtetic the cards are fully supported and the 12GB of each too...
5: when i choose the preferences in the bios, everybody said to desactivate this option, to be able to boot, i didn't try with it activated, i will, thx
6: i live in japan now the weather is pretty cool, on summer where i live it is 85% of moisture and more than 38° C,
meaning the cooling for 2 titan x full used for rendering at those conditions not good at all
also it will be working for 24/24 and 7 days a week, this is why i choose those components, i am involved in many projects which caluclations are important, it is like folding@home etc etc
so for my objectives: reliability, performances are priorities,
but silence is important too, all my 140mms on the radiators which cool the 2 titan X the motherboard, the cpu and the NVME produce less noise in dBA than a ventirad + 2 original systems of the the Zotac titan X
and most of it, it is pretty cool
for the point 3, yes it is not a priority, i was not able to stuck the processor with all the cores at 100%: i was able to make music, making long rendering in photogrammetry (6 hours), conversion of films from H264 to H265...
fully fluid and reactive with all those things used
in hyperthreading this configuration is impressive (compared to my last 6950x OC)
PS: strange point i felt the quality of rendering different on my MBPr and my hack
so i shared one of the screen with my original MBPr and the 750M as video card and my hack with titan x,
I played the same film on the same screen (a HEVC in 4K), it was fluid on both but the quality of the image was completely different, the GT 750M is totally crappy compared to the titan x, but when i say crappy it is like crazy!
of course it is a non sens to compare a mobile video card (middle range) and titan X
but the webdrivers are optimized like crazy
I would love to compare a Mac pro with 2 D700 and my rig to see the quality of rendering when i watch a film