I am not sure what you mean or the relevance in this context?
How would you install it otherwise, you have to create a USB with an installable copy of Windows written to it.
Completely agree if I was starting a new build.
To the op is your SSD a sata one or other connection type?
Have a look in the BIOS boot sequence and ensure that the SSD is the only entry available and/or at the top of the list. Also ensure that the SSD is plugged into the correct SATA port, some motherboards are a bit fussy about which port the primary boot drive goes into
I was told by an engineer that with Windows 10, shutting down is not the same as previous versions. It retains some information to assist with faster boot times. A kind of hybrid super hibernation.
A restart by contrast flushes the stored information. In some situations following configuration changes a restart is recommended rather than a power off and start.
Your experience seems to follow this reasoning in as much as the stuttering doesn't happen on a restart. Sounds like a Windows thing rather than mobo or PSU.
This sounds like totally normal behaviour.Are you actually shutting the computer down properly using the windows Shutdown button or just switching the power off at the wall?
If the latter Windows will treat it like a power cut and will need to reset itself to avoid file corruption. By not shutting the PC down properly you are making the startup sequence more complicated than it needs to be and risking losing your data
I like the idea of a PSU issue, where from a cold start it can't handle the inrush current and so the whole thing falls down, but when it retries there's already enough energy still in the system it doesn't have to work as hard. A test would be to remove the biggest power hog you can.
Another possibility is something is initialising and needs a reboot to complete the process, but for some reason doesn't sort itself out correctly. There's a ton of things that could be. A new EFI/BIOS would be something to look for (also anything TPM related).
Also disabling hibernate and nuking the file might be a plan (in case it tried to load it, failed and went back to the normal route).
Recent posters may want to read the part where the OP has already tried with a different PSU and GPU.
AND that there are a number of posters including myself have expressed the double boot is normally in a number of these type of boards when the power is applying for the first time... //static.avforums.com/styles/avf/smilies/facepalm.gif
If the OP wants to shave 5 seconds or so off his boot time, then don't switch it off at the wall.
The problem is the micro stuttering that is happening that would appear to be down to a one or more of OS Build, SSD, CPU or MB as everything else has been swapped out.
I did read pretty much all of it, but missed that bit, thanks. I like my hibernate idea still...
It won't have got to that stage yet.
In that if it thinks it's hibernated on last power-down, so goes to load the hiberfile, finds something wrong with it and so loops round to do a standard reboot (which will do a short power cycle). You get to that point very quickly these days (not like BIOSes of old).