Hi, I have been having a problem getting the memory dividers to work correctly? I suspect its something to do with my RAM or possibly a combination of the Opterons memory controller with the (ASUS) NF4-SLi chipset. I have tested so far: 1GB Kit (2x512) CRUCIAL *Ballistix* PC3200 1GB Kit (2x512) CRUCIAL *Ballistix* PC4000 1GB Kit (2x512) CRUCIAL *Value* PC3200 Both the *Ballistix* sets when run on a memory divider are not allowing the computer to pass the post screen? The PC3200 set have been tested all the way up to 275MHz (DDR550) 1:1 sync, but if I change the divider from 400MHz (1:1) to 333MHz (5:4) or 266MHz (3:2) the PC won't always boot? I am having slightly better luck with the 1GB Kit (2x512) CRUCIAL *Value* PC3200 but its still not quite right? (Maybe a Crucial thing?). Can you guys who are using an ASUS A8N-SLI Premium please post some info on your memory set-ups, particularly if you are using your sticks on a divider while overclocking! many thanks!