UEFI not finding SSD boot disk

[makery]

Help,  my daughters Asus x99 deluxe motherboard will every now and again lose the ssd boot drive. I have to keep unplugging all the other devices plugged into the sata ports and restart the computer to get it to boot up windows. 

 

I built this computer for her Christmas present so she could do her collage work on it and it is not much help if it can't boot into windows because the drive disappears from the boot drive menu.

 

This is her system.

 

5930k

32gb 2400mhz memory

gtx 980

Asus x99 deluxe

Intel 730 240gb SSD

WD 2tb HDD

Asus dvd player

Corsair RM 1000

Water cooled with a 240mm top mounted radiator

 

I don't know if the case matters for this problem but it is the Corsair 780t  with a fan controller.

 

 

I so hope I can figure this out soon.. she is back in school now and she needs to be able to get to work as efficiently as possible in order to manage her time for all the stuff she needs to get done for her classes.

 

Huge thanks in advance... 

[ImbaCore]

Did You changed boot device order?

[tmlhalo]

Check for a BIOS update for the board from Asus?

Check for a firmware update for the ssd?

Run a health test on the SSD to see if it comes back with any errors?

[Mew]

Did you install windows in uefi mode? If you did, the boot drive should show up as "windows boot manager", not your disk drive. http://www.eightforums.com/tutorials/2328-uefi-unified-extensible-firmware-interface-install-windows-8-a.html

[makery]

Thanks for the replies. I don't know if I installed it in uefi mode. but will look for windows boot manager to see what that is or says...  I don't know how or what a stress test on an ssd is but will look that up online or on youtube after I check for bios updates from Asus and firmware updates from intel for the ssd.. Thanks for the responses and directions to go look to see why it keeps disappearing from the boot drive of the uefi.