GIGABYTE GA-X79-UP4

[matas17]

So recently I installed OCZ Vertex 3 120GB SSD into my system and wanted it to be a boot drive. But I came into an issue whenever i start my PC it always  sets first boot drive as DVD drive as it should but the second drive gets set to my Western Digital Caviar green 2TB HDD and third boot drive gets set to WD Barracuda 1TB. So I get into BIOS to change second boot drive to my SSD but even if a save and reset the bios keeps changing it back to HDD no matter what. So I am in a bit of a trouble with my motherboard BIOS since it doesnt work the way I want it to and if I boot into SSD using that Boot option whenever you click F12 i get error message ''BootMGR is missing, click CTRL+ALT+DEL to Restart''. It cant be my SSD Fault because it previously worked but whenever i started getting that problem I wasnt able to fix it after.

My BIOS version is F3t
PC spec:
Intel i7 3820
GIGABYTE GA-X79-UP4
Corsair Vegeance 16GB 1600 8 Dims
x2 EVGA GeForce GTX 660 Superclocked
Corsair AX 760
OCZ Vertex 3 120GB SSD
WD Caviar Green 2TB HDD
WD Barracuda 1TB HDD

[Gloup_Gloup]

Hi matas17,

Welcome to forum,

GA-X79-UP4 (rev. 1.x)
http://www.gigabyte.us/products/product-page.aspx?pid=4288#ov

Manual:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-x79-up4_e.pdf

In bios, check:
ATA Port Information  page 46 ... you see your sata drive...

Boot Option Priorities page 47
Hard Drive/CD/DVD ROM Drive/Floppy Drive/Network Device BBS Priorities

Full Screen LOGO Show  put Disabled

Intel SATA Controller Mode (Intel X79 Chipset)  Page 20
What are setting? maybe try other....

GSATA Controller (Marvell 88SE9172 Chip, GSATA3 6 and GSATA3 7 connectors)  Page 52
What are setting? maybe try other....

GSATA Controller (Marvell 88SE9172 Chip, GSATA3 8 and GSATA3 9 connectors)
What are setting? maybe try other....

GSATA Controller (Marvell 88SE9172 Chip, eSATA connectors)
What are setting? maybe try other....

Boot Override Page 55
What are setting?

But if you have not sure, what setting , come here ....  but expose your situation with details....

[Fatman]

You need to set sata mode to ACHI in Bios and make sure you set your boot order for your SSD as first boot.