I am brand new to GIGABYTE MBs after years of really good luck with ASUS.
I build systems for clients (low volume) and for myself - both mostly as a hobby. This is my first Gigabyte build.
HAVING THE EXACT SAME PROBLEM - GOING INTO BIOS at boot HANGS THE SYSTEM AT A BLANK SCREEN! I have tried bios versions F12, F11 and F10 - all producing the same result.
My system: Win 7 x64 SP1; X99-UD4 MB; i7 5820K; PNY GTX 780; 850watt Thermaltake; some model of Titan CPU cooler
(well, it works well); 8GB ballistic sport DD4 2400 (will add more ram when everything works)
EVERYTHING works great except for getting into BIOS, which is a big deal to me. The overclocking available between the MB, CPU and cooler is incredible. About to try booting with all drives connected to see if this looks exactly like what you all saw.
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And removing all the SATA hard drives (all NTFS) DOES indeed allow me to get into Bios. Setting the type to RAID (instead of AHCI) does not help me as I do not have a RAID arrangement.
WOW....Cannot believe that after more than 1/2 year Gigabyte has not fixed this! Surely, if the BIOS is accessible without drives, there is someway to get into when they are connected...UNLESS...there is hard-coded instruction that looks for drives before they reprogram-able instructions begin to execute...hard to imagine, but maybe THAT's why there was a rev 1.1 board issued.
And IF that is the case, they sure as heck better not leave the early buyers hanging. That is something you expect from a cut-rate supplier. (Almost three months since any BIOS update. Not hopeful. ) If in the end they don't fix this and they don't swap out the boards (assuming no bios fix) I will never use them again and make darn sure as many people as possible know about what they did....we'll wait and see.....