bios ver 1006 -Chip Configuration - Bank Interleave has a bug with it, with 2 Bank option it turns off the bank interleave, with disabled it turns on 4 bank, while in Auto it turns 4 bank as well..double checked with sandra 2004 & cpu-z 1.20a
edit : on motherboard A7V600 Revision 1.xx
edit : on motherboard A7V600 Revision 1.xx