"BIOS settings do not fully support the boot device" ...What boot device?

Archean_0-1354672

Honorable
Jul 5, 2013
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10,710
PCPartPicker part list: http://pcpartpicker.com/p/1Ppfw
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CPU: AMD FX-8350 4.0GHz 8-Core Processor ($184.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ Microcenter)
Motherboard: Asus M5A99FX PRO R2.0 ATX AM3+ Motherboard ($124.98 @ SuperBiiz)
Memory: Patriot Viper 3 16GB (2 x 8GB) DDR3-1600 Memory ($124.99 @ Newegg)
Video Card: Asus Radeon R9 280X 3GB Video Card ($356.30 @ Newegg)
Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case ($89.99 @ Newegg)
Power Supply: XFX 650W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($59.99 @ NCIX US)
Total: $971.23
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-10-26 09:09 EDT-0400)

After getting my RAM to register, I was greeted with a screen that said "BIOS settings do not fully support the boot device".

I have no clue what device its talking about...

The only thing that i can see is that the LED [on my motherboard] is labeled "BOOT DEVICE LED"

any ideas what it wants?

Thanks
===
i should probably mention that I have no USB or HDD or SSD installed...is that what its whining about?