To some up the situation with the 815e boards ...
Abit SE6 ... 133,137,140,145,150,153
Asus cusl2 ... 133,137,140,145,150,160,166
Aopen AX3S Pro ... 133,138,140,144,146.6,150,157.3,160,166
MSI 6337 ... ?
All of the above have vcore tweaking. The asus is the only one which
allows vio tweaking. The Aopen doesn't support asynchronous memory timing i.e the memory always runs at host clock.
In terms of overclocking, if one has memory which can go at 150 - 160
then the Aopen seems to be the winner. If one requires a bit of vio tweaking to make the memory stable above 148 fsb, then the asus may be
the choise. Not a lot in the differences ! Still, considering the record of all the above manufacturers with oc'ing features, the number of fsb's betwen 133 - 150 is appauling cosidering that many coppermines can be oc'ed in that range.