Sli WooDy is right its the same for my premium.
To quote the manual " When using two DDR DIMM modules, install into DIMM_A1 and DIMM_B1 slots only"
DIMM_A1 is the closest to the processor and DIMM_B1 is third away. (The blue ones).
This is the first ASUS board i have owned my self, and it's the best choice i ever made, it was either this or a lan party and i think i made the right choice. Im not to impressed with the Cool Pipe though, its ok at stock speeds but mine tends to be a bit on the toasty side under load, i may invest in a fan to go ontop of it!!