Gigabyte GA-880GM-UD2H Rev 1.4 : More Options?

[chris89]

http://download.gigabyte.us/FileList/BIO...1.4_f8.exe

I have this board and am running Opteron 1389 and have 4 x 8GB modules 1600Mhz High Density.

With 2 x 8GB it has minimal issues, though 4 x 8GB it isn't quite stable.  It will work with 32GB ram but is unstable.

My question is can you add a couple memory multipliers if possible between 1066 and 1333?  

Not to mention more compatibility with 32GB ram?

Thanks