Hello,i have a huge problem so I will try to explain in the best way I can(the last 2 days I read a lot in this forum I learn many things but still I can't help my self)
I have this build
MAXIMUS IV EXTREME-Z bios 3603 the last one
i7 2600k
8GB ram
1 Samsung 840 evo
1 WD 750gb
I know that its a old build but for moment Its doing his job.
I was using windows 7 x64 till last month when I decide to upgrade 10 x64.everyhing went ok but few days ago I saw that my magician bench won't give me the same results like in win 7.so I went to asus support and I install Intel Rapid Storage Technology Driver software V12.8.0.1016 for Windows Win8.1 64bit---(WHQL),no drivers for windows 10 to get.
I install the driver ,did a bench and I was happy my ssd again was working as before,but at the next restart when I login my WD HDD was not present to the duty. I enter to the bios and bios was detecting.
first I uninstall the driver from asus and went back to the windows default driver.and again my WD HDD was available in windows.
I tried also diferent versions of the driver from this forum and with the same effect,including sometimes my bios its not able to detect also.
can someone tell me witch driver I need?or if I need to get a moded bios?
sory for my English
thanks

thanks for your replay
but that its the problem,if I try to install a driver the same story.
I tested with drivers posted by you.
I moded also my bios using UBU, using first 3 OROM,the high as 12.9.2006
I did a fresh install yesterday night with same results.
atleast updating CPU microcode I get bet OC :P
as I said windows driver is lowering my SSD performance that's why I try to find a solution to keep Rst driver

Before installing drivers both was connected to intell sata3 6GB ports,i have only 2 and 4 sata 3GB
now my WD is connected to the marvell port,its working only this way
first driver was http://www.asus.com/es/Motherboards/MAXI...pDesk_Download/
after I tested some from your post Recommended AHCI/RAID and NVMe Drivers
Intel RST drivers v11.2.0.1006
Intel RST(e) drivers v12.9.4.1000
I will try now to change sata cable,for some reasons after restarting pc bios is not able allways to detect my second hdd if its connected to the intel sata ports

din't help the new sata cable.
bios detect the hdd but windows its too lazy,not even in disk managament as hiden,zero WD hdd.
right now i have OROM IRST RAID for SATA - 12.9.0.2006 in bios,original was lower 11.x.x(i tested also with original bios and same results)
in device manager - IDE/ATAPA controlers
i have: Inter(R) Desktop/Workstation/Server Express Chipset SATA AHCI controler
Standard SATA AHCI controler (i think its the marverll one)

here it is
so after few tests,90% of time its doing this. IF i unplug and replug the sata cable for WD at first boot will appear,but if i restart the pc only bios will detect.forget this its not working as i bellived.
in this photo as you can see windows detect only the ssd 840 evo and both hdd's are connected to the intel sata 3 ports

PS: now its original bios,only with CPU microcode moded.

this error i get from IRST

If Mbr/GPT are a problem then why if i leet windows default driver will work?and when i install any version of Intell AHCI driver windows its not able to detect the WD HDD?
I did also some test,i had a old old OCZ vertex 3 ssd and i install on a intel 3GB port.again bios detect him but first time when i login windows the same problem(no new hdd).i did a restart and after windows was detecting my OCZ SSD.i did a format,copy paste to see if its work,did another 3 4 restarts to be sure that won't go away again.
so in coclusion my 2x SSD are working on intel controler and WD its working only in marvell.
my eyes are bleeding and i din't find any other similar case over internet.

hey again and thanks for you time
here i did some photos
from what i see hwID its the same

here its windows with default driver

and here its Intel 11.x.x fernando moded
if i try to install WHQL drivers also 11.x.x or up its will add the controler as Inter(R) Desktop/Workstation/Server Express Chipset SATA AHCI controler
in both cases unsing driver for AHCI controler my WD its not present

Hi

Try updating to v13.1.0.2126 using have disk method and selecting 7 series.

it fully supports 6 series AHCI controllers since 7 series are the same.

If that doesn't fix it, try the modded 14.8.1xx here