Wow, I ordered the same combo off newegg and I'm having the exact same issue.
Motherboard: GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD
Processor: AMD FX-8120 Zambezi 3.1GHz Socket AM3+ 125W Eight-Core
Memory: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866...