Today, I had exactly the same problem that you had and to solve this problem, I I followed what you made but when I try to replace the other memory module after the reflashing of the BIOS the computer begin again to crash at the start with a black screen and 2 long beeps followed by a pause and then 2 long beeps again.
So, How did you managed to replace the other memory modules ?
There is a means to put back the former version of BIOS so that barettes re-works ???
I will be most gratefull if you could help me
PS : I have exactly the same memory modules that you have
I'm not sure I understand exactly what you are asking, but if I understood you right, you are asking how did I reflash the BIOS back to a previous working version?
If that is correct, with one memory module installed in Channel A, DIMM 0, I was able to successfully boot up into Windows with BIOS version 5926. At that piont, I went to Intel's website, downloadd the previous BIOS version I was using, 5924, and reflashed back to the previous version. Once the update completed and the computer rebooted back into Windows, I turned off the computer, install the rest of my memory modules, and all was good again.
Does that answer your question?
If not, provide more detail and I will try to help. I will be available for a few hours this evening.