For those running 4X1gb sticks:

After the reccomended settings from Ace this board seems stable now. I'm running 4X1gb crucial ballistix pc6400 at 5-5-5-12 with a 2.150 from bios and on page 131 I've just changed what Ace told me. PWR temp area doesnt exceed 60C on full load cause I have quite good airflow in the case.

A friend (Gomar) on the greek overclocking forum "thelab" did the vmod to reduce the vcore drop. 1.55 on bios gave 1.55 on full load with a quad. Before the mod he had a drop of 0.1 volts!!! (1.60 gave 1.49 on full load)

If anyone wants more details about this I can ask him to post pics