The first two memory slots stoped working?

i have a evga 680i motherboard. there are four memory slots. i just reformated my computer and i had to take out 2 gigs to install windows. but left the other two gigs in the computer. when i reinserted the two sticks into slots 2 and 4 i put them in backwards and really forced them in!! when i turned on the pc the psu would just power on for a split second and then turn right off. i then firgured out that i had put the memory in slots 2 and 4 wrong. now slots 1 and 2 arent working at all. right now at the moment i am running 2 gigs with slots 3 and 4. i am worried becuase i always thought you dont want to run the ram right next to each other. i have always heard you run the ram in slots 1 and 3 or 2 and 4. so do i have a busted motherboard?? thanks