As we have already mentioned, we had an issue with the BIOS that shipped with our version of the GA-890FXA-UD7. Because of this we had to drop in a lower powered CPU and flash the BIOS to the F2 version. Once this was done we could drop in the Phenom II X6 1090T.
After this little issue things went well until we started overclocking. At that point we ran into the issue we described in the BIOS section. Once we had that sorted we have to say that things settled down for us and the GA-890FXA-UD7 performed well.