The reason why BIOS version 0066 did not work on you system could be because your system had BIOS version 0021 and you jumped up to the latest version 0066.
This specific model has 15 different BIOS versions, which means there are many fixes between one and another.
What we recommend customers to do is to check how many versions are between the current BIOS and the latest one. Then, depending on that, install or flash 1 or 2 versions before getting to the latest one.
At this moment the system is working fine with BIOS version 0064, so it is not necessary to update the BIOS to 0066.
Updating will be require if for any chance you start getting a blue screen when installing Windows 8 or if the Intel® Integrator Toolkit stops working on Windows 8.