Originally Posted by RedLeader
Look like resistors to me. Decent sized ones, actually. I wouldn't worry about a couple missing ones, probably just a different version of the same board.
nope. not resistors.
Those are ceramic SMD capacitors. and your board is fine, if they were knocked off, they would have tore off the smd pads as well.
AND, even if they had been knocked off, your board would have functioned fine.
If you look on your board, you will see empty smd pads everywhere. They exclude some non vital components to save money.
However, replacing some of them can increase overclockability. I usually go through and add back the components on all my boards and graphic cards so I can reach max clocks.