I recently upgraded my video card to a geforce gtx 960. After installation my system hung on the bios splash screen for a minute or two before booting. While not a huge deal I searched for a solution. I switched pci rom priority from EFI to Legacy. This did the trick and my computer boots fine. My question is...Does this change affect the performance of my new video card or system in general? If so, is updating the BIOS the next step (hopefully it's not necessary). System specs below.
Windows 7 64bit
Gigabyte G1.Sniper.M3 Bios Version F-7 (latest is F9 I believe)
Intel i5 3570k
geforce gtx 960
500gb Samsung SSD Drive