i have a dell dimension 4700 3.0 ghz cpu 1gb ram i attempted to add another 1 gig 4200 pc2 when i had 2 512 3200 pc2 and then started to get memory parity error when i turned off pc, i contacted dell tech support and they did some diagnostic tests and now they want to replace my motherboard and ram? did i somehow ruin my ram in doing this and what sort of compatibilties should i be lookin for in the future
