Quote from DFI NF4 Ultra manual:Originally posted by: Stokes
I never knew the ultra-d can't use three sticks of ram? Or did I misunderstand that statement
Q: Why will the board fail to boot when 3 Dimms re used?
A: The integrated memory controller in AMD's 64-bit socket 939 series CPU supports dula channel however the controller is not capable of accurately distinguishing detween dual and single channels resulting to boot up problem. If you have luckily booted the system, the total memory size detected is from 2 Dimms only, not 3. Therefore we do not suggest using 3 Dimms.
Going to be the same for any S939 board. You have to use 1,2 or 4 sticks.