I would just wait and see exactly what Gigabyte has to say, and disregard some others advice which is based on their own knowledge and not Gigabytes information.
The Gigabyte I bought did not support the 9850 when I bought it but i like you had a dual core. Which I was using and i emailed Gigabyte and they assured me it would work and when I put it in it did. So since it isnt any type of huge platform change as I said I would wait for quality information