I am running 2x512 MB Corsair XMS3500 rev 1.1 here. So far no problems on stock speed but as soon as I get over 217MHz it will not handle 2-2-2-5 anymore, even with 3,3V.
But with a lower ram divider I am now at 2700MHz with my A3000+.

Btw. I used the last two bios revisions.