This is probably overkill but "if" you were statically charged at the time then you might damage the modules, thats the reason why you shouldn't touch the metal contacts.
If you have any isopropyl alcohol around you could clean the contacts again.
thats my 2 cents!
**edit, just noticed that you have the memory modules sloted in, i think if your running a duel channel you need to check that your memory is in the proper slots to get the correct performance.
also you should remove any extra screw holes on the casing tray that arent being used, i see three on the edge they are okay but any underneath might case problems.