Get the latest BIOS for the board and try again and if that doesnt work you will need to set the timings and the voltage of the RAM differently remember that if you are using more RAM sticks then they will require more voltage to make them all run..........
If for an example you are running the 2GB at 5-5-5-15 and 42 tRAS
you will NEVER get that speed with 4GB you need to drop it 4-4-4-12 and you may get away with 42 tRAS but may have to up it to 52 |