Asus sabertooth 990fx ram problem

Hi this the first time I am building a computer and I am having a large amount of difficulties with my ram. The red LED for check ram is on and no matter what I do I cant get it to work I have pressed the MEM OK button that failed after several attempts. My ram should be compatible. I specifically chose ram out of my motherboards manual.I have no idea what is wrong and would greatly appreciate some help.
MOTHERBOARD:ASUS Sabertooth 990fx R2.0

CPU:AMD FX-8350 Vishera 4.0GHz (4.2GHz Turbo) Socket AM3+ 125W Eight-Core Desktop Processor FD8350FRHKBOX

Graphics card:VGA EVGA o2G-P4-3660-KR GEFORCE GTX660 Ti

RAM: G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model F3-19200CL11Q-16GBZHD
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  1. Hi,
    the CPU requires the 1006 (or newer) BIOS version.
    There's a barcode sticker on the board. The last 4 digits stand for the board's BIOS version.
    If older, you might need using flashback for updating the BIOS.
  2. alexoiu said:
    Hi,
    the CPU requires the 1006 (or newer) BIOS version.
    There's a barcode sticker on the board. The last 4 digits stand for the board's BIOS version.
    If older, you might need using flashback for updating the BIOS.

    So how do I update the BIOS?
  3. Download the latest BIOS from ASUS http://www.asus.com/Motherboard/SABERTOOTH_990FX_R20/#support_Download_29
    Unzip, rename the file to ST990R20.CAP and save it on a FAT formatted USB stick.
    Connect the drive to the Flashback USB port. Make sure that the power supply is connected to the motherboard and is on. No need to start the board.
    Press the Flashback button for 3 seconds (a flashing light appears).
    Check the manual for the Flashback USB port and the Flashback button.
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