I just sent a comment to ASRock technical support stating that this BIOS version appears to be defective. I successfully flashed the L2.11A version the same way I had flashed 1.80 and 2.00 and when I allowed the flash process to restart the machine, POST hung in an infinite loop. The machine was going nowhere fast. I got another chip and am running back on 2.00 successfully. The only problem I have now is that the 1394 GUID needs to be set so I don't have to press F1 on every reboot/startup. My comments to ASRock technical support are shown below:
SUBJECT: Defective BIOS version L2.11a causes POST to loop.
The purpose of this notification is to alert you to the fact that BIOS L2.11a released on 1/8/2013 for the 990FX Extreme4 Motherboard which is supposed to improve memory compatibility is DEFECTIVE, causing the motherboard POST routine to remain in an infinite loop during power-on/reset, and preventing the BIOS configuration screen to be displayed by pressing F2 or the "Del" key, and stopping the hardware from loading any operating system. In my case, this BIOS was flashed successfully from a USB memory stick using "Method 1" as per the ASRock instructions, on a machine which had been running BIOS 2.00 successfully for some time. Version 2.00 had been flashed to the board in the identical manner several months ago. After the "flash" of the L2.11a BIOS, the flash process asked to reboot the machine which I allowed. The board was unable to function, since as it looped in the POST routine as stated. Naturally, I cleared CMOS, etc.
To bring the board back from the dead, I installed a NEW BIOS chip with the 2.00 version in the board. I am not a "newbie" at this, having worked in the computer industry for 30 years and have dealt with many computer hardware/software issues during that time. Clearly, this BIOS (L2.11a) is defective and should have NEVER been posted to your site and made available to the public, even as a "beta" release since it renders a working machine unusable. In the past, I have used other ASRock motherboards installing them in PCs for various clients.
WHAT I NEED NOW: to correct the 1394 GUID error where the CMOS and FLASH memory are out of sync with the board. Please send me the utility for this motherboard so I may correct having to press F1 on every reboot.
To tell the truth, I am rather aggravated at all of this and am contemplating never purchasing anymore ASRock components for either myself or clients.