My system mem speed is 1080 with the latest F7H bios 5 6 6 18
and I guess I could do more if my memory were identical. Right now they are 2x1G ADATA Extreme Edition 800+ and 2x1G Team Group Extreme 800. I'll wait and see maybe I'll get one 2x2G 4 4.. at 1066, but right now they are too expensive here ... about 1000$