linux, windows? how many cards? whats cpu usage like?
x11 does use more cpu and people have found it to be a draw back, on a side note, try this one, its the one i use for 2.2
https://mega.co.nz/#!E5lR0YJI!cTm25l4tfLoJyMBlvIfBKUlc15PHLXMZwMicD0h37NA

it was compiled after version 1.0 so it has some newer code, which may help