You have summed up stupidity pretty well. Simpler and less risky is preferable to a haphazard, learn on the go "MO", which isn't an MO really.
this is why I was experimenting, as I could make my mistakes where it didnt matter, as I was going to reformat all that and start again once I had learnt from the mistakes. and with that I ran into a plethora of elusive obstructions.
once the installs are permanent, I keep to what I already know for sure,
if I were to experiment I would backup the entire disk first which costs some 3 hours, and further hours if it has to be reinstated.
now things went fine until I tried installing on a 2nd drive, and then everything went to pot.
this is where USAFRet's advice got me out of that, to disconnect everything except what is necessary, which is 2 drives, the installer and the target.
now last night I left the MSI driver installer running and then the MSI center installer which installs various further programs, and that took hours. then when I went to bed I set up Linux shell commands to backup both drives, but the Linux DVD wouldnt load, and instead I just got windows 10. verified I had set in the UEFI first boot device the USB CD DVD, and 2nd boot device the windows loader for the main win10 install.
tried again, and again the LInux disk didnt boot, instead getting win10. then scrutinising I realised its because of the MSI driver installer drive that I had just been installing! as that manifests as a CD drive, and by chance the 10 port socket it is attached to must be earlier than the one for the optical drive, so the mobo tries it, fails, and tries the win bootloader instead.
I disconnected the MSI driver installer thumbdrive, and now Linux booted fine.
I then realised this is probably why the win 10 installer thumbdrive failed originally before I used USAFRet's MO of removing everything, I think the MSI thumbdrive must have been ahead of it in the mobo's enumeration,
and this would also explain mystifying times when the optical drive wouldnt load.
the mobo enumerator appears to class disks into genres, and only test 1 of each genre, if that fails, it skips the rest of that genre, and goes to the next genre. so if by chance you connect to the USB sockets in the wrong sequence, a drive wont boot! if I experiment I can maybe decipher the entire enumeration sequence, some of the sequence can be specified in the UEFI.
I have here a photo of the win10 bluray installer options:
http://www.directemails.info/tom/win10/win_install_drive.jpg
just by looking at that, I can tell you what is going on:
the 309.9GB is the first scratch install of win10, as its not the full 310.5GB, as there are 2 administrative partitions on either side, automatically generated by the earlier install. the highlighted partition is thus the scratch install of win11, eg the entire 310.5GB disk free.
here is a photo of the Linux GParted program:
http://www.directemails.info/tom/win10/Linux_Mint_GParted.jpg
just by looking at that I can tell what is going on, the 620.35GB being a bit less than the intended 621 means that is the main win10 install, and I havent yet installed the main win11 install yet, and would be moving towards that.
there is a 2nd essential program on the Linux Mint side, which is the Disks program, this is necessary to make NTFS partitions writable, where I make just one writable which is the "Large" that you see in the task bar, as that is one ginormous almost 4T workspace from the 4T Samsung 990 Pro. eg the compressed backups last night of both 2T 990 Pro's went to there, where the one disk took 2 hours 13 mins, and the other disk took 2 hours 53 mins.
with my MO, if you refuse to use Linux, then you just need to remove all other disks with boot loaders, and also any disk with CD filing system which isnt the installer. I think other optical drives should be alright provided no disk in the drive.
with my MO, the first thing you need to do is a "site survey" of all attached disks. to discern an aeriel view as to what each is. by which on the Windows side I mean this view, which is well hidden to on Windows:
http://www.directemails.info/tom/win10/2024_05_18_0256_disk_overview.png
I will have to study that, what I need is whatever is optimal for this specific configuration.Not all thermal paste is created equal.
Here's roundup of thermal pastes, that TH is keeping up to the date,
article: https://www.tomshardware.com/best-picks/best-thermal-paste
At the bottom of the article is thermal paste comparison.
Thermal paste that i have, is Arctic Cooling MX-4. I have entire syringe (tube) of this thing:
One of the reasons why i suggested full-tower ATX was to give you more space regarding cable management. Behind MoBo tray, there is enough space to route the cables. And if PSU shroud gets into way, remove it completely. After all, PSU shroud is just for eyecandy. It serves no practical purpose.
I thought maybe the L shaped PSU cover plate was to shield from heat, but you think its entirely eye candy?
its a bit of a nuisance to remove to attach further PSU cables, as it has 3 thumbscrews on the opposite side to the door, ie you have to remove the side panel, then remove 3 thumbscrews, then precariously remove the plate as you have to dodge obstructions. and then later the reverse process of all this.
I will try your suggestions as regards cable decluttering, and also will try to take some photos.
the PC is quite heavy, and I may have to detach various cables to photograph it properly from several angles, but I will try to do this later.
one problem is when I take photos, its not the same as seeing the actual machine, things which are obvious with the actual machine, are non obvious in a photo, now this is partly a matter of photographic skill,
right now I have been installing various software I use, and I want to try and reinstall properly the Amiga emulator. that has various stuff on the data disk borrowed from the 2010 PC, where I need to return that to the 2010 PC to borrow various settings. Before that I plan to migrate all that to maybe the 4T drive, or maybe the 2T drive with the scratch partitions.
with migrating it, I also need to do a verify that all the files are copied verbatim and not just hope for the best.
I tried installing the Amiga emulator on the very first scratch install of win 10 64 bit many weeks ago, but it was unsatisfactory graphics, nowhere near as good as on the 2010 PC. My memory with the 2004 PC was that the emulator graphics only became good after I installed a graphics card. I think there is a new version of the emulator for 64 bit windows, so there is a bit of work to arrange it.
next on my agenda is to install the bluray burning software from Cyberlink and Corel, including upsell. both of which involve ginormous downloads which took many hours to download! which you can see in the screenshot are 20.93GB of install files!
either or both of the bluray burners only work on win10, not on win11!
this is another reason why I need both win10 and win11.