Just find out the culprit: Raxco PerfectDisk
It's the main culprit but AHCI driver does have an impact too: for me the best one is the standard one from microsoft. Using intel ahci driver ...

Another strange thing is that my reboot is faster than a cold start.
From what I understandood fastboot does not work for restart... so ... wtf ?
The difference is about 5s. It's close to the...

Nope ...
Not that simple in my case, all the settings are as they should be ...

Actually, it's windows 10 which is slower when the 2 hdds are connected. Bios boot does not seems to be slower.

Just to report:
- I manage to make a GOP vbios using a tool from win-raid site and it's working !
- However boot time continued a bit slow, far lower compared to my cheaper laptop
- Then I...

Both with 8gb: laptop=ddr3 1600, desktop=ddr4 2666
laptop boots bios and windows faster than desktop
23sec boot on desktop is bios + windows. not that bad but could be better
anyway, no GOP...

Yes, everything seems to be correctly configurated. Seems that a GOP graphic card is needed to have full working fastboot.

Searching a bit more I found this : http://www.tomshardware.com/faq/id-1961933/configure-windows-ultra-fast-boot-uefi-gop.html
So : no gop compatible graphic card = no fast boot
This explains why...

My install cannot be fresher. My boot time is not so slow: 23 seconds between power ON and user logon window. The fact is that my laptop is faster: <15s. I'd just like to understand why Fastboot is...

Not working for me ...

Hello

I have a new configuration (z170 chipset, i3-6320, fast SSD) for my desktop and it boots slower than my laptop (Acer V3-574G (i7-5500) with the same SSD as my desktop). I don't think the...