I understand that you are having problems using a RAID card on the Intel(R) Desktop Board D525MW.
In regards to your question, it is very unlikely that this problem will get fixed with a BIOS update as Intel(R) will usually not validate the usage of RAID controller cards on Intel(R) Desktop Boards.
There is an option that may help you with the usage of this card. The option is called expansion card text and will be found in BIOS.
Hope this works for you.
thanks for the reply. I think I had given the mentioned bios option a try without luck. But I'm afraid I will not be able anymore to verify it. During some tests with other BIOS versions the board went to heaven. My last BIOS flash went ok as all others before, however, after the machine was saying that it reboots now it never started up again. Also the BIOS recovery method (-> removing the jumper on the board near the mPCIe slot) does not change anything. It just does not do anything when powering on. Only the fans start up ... this seems to be hint to go for a board supporting the 3ware controller ...