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Boot option priorities and Hard drive BBS priorities

Sep 15, 2014
188 (0.10/day)
System Name hazazs
Processor Intel Core i7-6700K @4.0GHz
Motherboard MSI B250 GAMING M3
Cooling be quiet! Shadow Rock Slim
Memory 2 * 8GB Corsair Vengeance LPX DDR4 @2133MHz CL13 Red
Video Card(s) MSI GTX 980 Gaming 4G
Storage Samsung 840 EVO 120GB / WD Caviar Black 500GB
Display(s) Dell P2419H / SONY KDL-43W755C
Case Cooler Master Silencio 652S
Audio Device(s) Creative Inspire P580 / Sennheiser PC 320
Power Supply Cooler Master V550 Semi-Modular
Mouse Logitech G300S
Keyboard Logitech Ultra-Flat
Software Microsoft Windows 7 Ultimate SP1 x64
Hi all,

In my Mobo's BIOS there are two options under the Boot menu: Boot option priorities and Hard drive BBS priorities. What is the difference between them. The first option contains all the available bootable devices (hard drive, flash drive, DVD ROM, etc.) and the second contains only the hard drives. So what is the point of the latter?
Anyway, I have set the first device to my SSD in both options, and leave all the others at Disabled. Is it okay?
Thank you,

May 8, 2016
827 (0.69/day)
System Name BOX
Processor Xeon E5-1680 v2 @ 4,3GHz
Motherboard Sabertooth X79 (BIOS 4801 + NVMe mod + uCode update)
Cooling Thermalright Venomous-X (w/LGA 2011 kit) + 2x Delta PWM Push-Pull
Memory 8x A-Data Xtreme 2000X 2GB (1868MHz CL8.9.8.24 CR2T @ 1,65V)
Video Card(s) ASUS GTX 1080 (FE)
Storage Samsung SM961 256GB NVMe, RAID0 2x WD10EZEX (1TB), HGST HUS726060ALE610 (6TB)
Display(s) Samsung T240
Case NZXT Tempest (Nanoflux/PWM fans only, some w/LEDs)
Audio Device(s) ASUS Essence ST Deluxe 7.1
Power Supply Seasonic X-760 (760W)
Mouse Roccat Savu
Keyboard Logitech UltraXPremium
Software Windows 10 Pro x64
Benchmark Scores https://www.passmark.com/baselines/V9/display.php?id=108080818886
You can have multiple removable media as boot options in one go (ie. check floppy, check CD/DVD, check USB and if nothing is found - go hard drive), but only one hard drive.
Second list (hard drive only list), let's you pick the default hard drive to boot from (and shows what is available).
Of course it also allows you to pick Windows Boot Manager, if you have Windows on GPT style drive.