The nForce420D/Award chipset runs best with 2 DDR Dimms fitted. Prob is when I opened the case to upgrade to 512 from 256MB I found that Systemax(Who never bother to reply to tech. queries) has used slot 1 and 3. MSI say Dimms must be populated consecutively starting with Dimm 1 socket. Any ideas?
Many thanks Rayuk. I bought 2 of 256mb strips because of the nVidia 'Twinbank Technology'. I have found a pic of the motherboard in a review of this PC and the Dimms are in 1 & 3 slots. Im still puzzled as to why.