Quadro Fermi Sync with Quadro Kepler Sync


I am experiencing an issue with syncing a Quadro Fermi (5000 w gsync card) with another computer using a Qadro Kepler (K5000 w quadro sync card). What I am experiencing in my application is when enabling swap sync (using wglJoinSwapGroupNV and wglBindSwapBarrierNV) is that the Kepler card syncs to 30 hz while the Fermi syncs to 60 hz. The timing server is on either card (I’ve tried both) and is syncing to a display @ 60 hz.

Is there any known issue with using 5000 and K5000 sync cards together?
Is there any setting that may help me achieve sync?