AMD Venice and 4 modules of DIMM PC 3200

Hello all,

I have an Asrock eSataII-939 mobo with 2x Kingmax 512MB PC 3500 DIMM-s

I need to know if i buy 2 more modules of 512 MB PC 3200 DIMM -s would my mobo run all of them at 400 MHZ AND would it be capable of running all the 4 of them at 400 MHZ in ( two separate dual) channels?

Or would it be wiser to buy an 1 GB module and forget the dual channel-dream?

Thanks all for the answers