The problem occurs after connecting the SATA drives to the Marvel controller.
Postcode "A0-IDE initialization is started"does not disappear 50 seconds, and then Windows 10 64 bit is loaded in 3-5 seconds.
I can not use only Intel controllers since I need 6 SATA connections.
The BIOS version is 1.03, BIOS in the UEFI mode,system installed on the SSD Plextor M8PEG 256GB.
And why in the BIOS it is indicated that the NVME devices are not detected ??

Does this occur on all three bios?

I tried all of the above and nothing helped.
It only helps to turn off the Marvel controller in the BIOS, it starts immediately loaded in 10 seconds.
Tried to turn on and off the CSM in different variations, switched to BIOS 2 with version 1.01, disconnected all the boot devices except SSD Plextor and everything is useless (
The SSD is installed in the bottom M2 slot, since the top slot is behind the video card and is heated due to bad blowing, especially this Not an option for me since I need at least 6 SATA connection  (2 WD 640 gb RAID 0, WD 4 tb, Samsung 2 tb and two DVD drives)
 

I need 6 SATA connections and therefore I need to solve the problem-even if I plug into the top M.2 slot I still will not have 2 SATA slots.
Just how can sell the top motherboard for 300$  and do not take into account the elementary functions, it would be better not to put the Marvel controller and the buyers would see how much it is possible to connect the controllers without problems-I did not expect this from EVGA (((
SSD idle temperature 48-50 c in bottom slot.

Anoobi$
I need 6 SATA connections and therefore I need to solve the problem-even if I plug into the top M.2 slot I still will not have 2 SATA slots.
Just how can sell the top motherboard for 300$  and do not take into account the elementary functions, it would be better not to put the Marvel controller and the buyers would see how much it is possible to connect the controllers without problems-I did not expect this from EVGA (((
SSD idle temperature 48-50 c in bottom slot.

the top m.2 (the one under the top x16 pcie slot ) is shared with the U.2 and not the sata ports, so you can use a 6 sata ports and the top m.2. page 26 in the manual list everything

Cordorb
I use both top and bottom M.2 slots for SSD ( top Intel M.2 for system and bottom Crucial for storage )
 
the top M.2 goes not go over 35 C even with folding using a EVGA 1080 FTW2
 
Could be Marvel  ports are better now but build from 10 + years ago I would only use for SATA CD/DVD use.
 
I do have a extra Crucial M300 on the Marvel  port now for testing and I am sure that is why I keep getting killed in TF2.
 

i use the marvel ports only for my system backup drive, so speed is not a big concern. i do wish intel would make more pcie lanes and sata port available on these glorified south bridge chips though.   

A BIOS Update cannot change what you are asking for.
I would recommend that you only connect the Dive that you are going to Install Windows 10 on to stop Windows 10 from creating OS Partitions on your other Drives whether SATA or SSD SATA Drives that lock the Drive to Windows 10.
 
What are your needs for 6 Drives?
What Raid Mode are you thinking?
For Raid 5 you only need 3 Disks and the 4th could be your Spare!
If for Media like Music or Videos for a large volume maybe take a look at using a Raid Controller like;
HighPoint RocketRAID 2720SGL 8-Port SAS 6Gb/s PCIe 2.0 x8 RAID HBA
Or 2 of these
HighPoint Rocket 640L Lite Version 4-Port PCI-Express 2.0 x4 SATA 6Gb/s RAID Controller
 
I Do Not Work for High Point.

And someone faced the problem: after turning on the computer in DC, EVGA Z270 Classified K motherboard is started for a second and turns off for 2-3 seconds, and then turns on as usual.
This happens only after disconnection from the DC.
Does it depend on the motherboard or on the power supply ??