It might be windows 8 causing the problem. Because windows 8 uses UEFI and it will boot really fast. Try to just disconnect the drive that has windows 8 on it and see what happens. All I can say is update the bios.All of the X99 boards are having problems. I have the same board and so far I have not had any problems.But again I'm not running or will not run windows 8. Plus I'm a Microsoft Partner too.
It could be that drive that is causing the problem. I have had brand new drive that are bad. Do you have another drive that you can install windows on and see what happens.
How do you have you drives connected. The last 4 by themselves are standard sata device connection. I have the same board and I have 2 SSD, 3 HHD, DVD, & DVD/rw. My DVD drives are in the last 4.
I just double check everything to make sure how the drives are connected. #1 SSD - #2 DVD drives - #3 WD 10,000 rpm drivesIn the bios the sSata controller is set to AHCIThe Sata controller is set to Raid. Plus the SSD's show up as [UEFI sandisk] & [Intel Volume 0] in the bios as the 1st & 2nd boot. It was first set up with [Intel Volume 0]. But when I updated the bios it now has [UEFI sandisk] too. I can boot to either one of them.
Well so I pulled all the drives out and set the PCH to RAID and it worked! Although i had to go back to ACHI and into windows to change the registry from ACHI to RAID but it worked. Thanks alot mate that had me stumped for a while!