MPC-HC Jitter problem and unstable FPS

i want to ask when i watch the video in 59.94 fps 1280x720, there is sometimes 1 jitter and a little bit of unstable fps.

specs:
i5 2500k OC@4.33ghz
ATI 5770HD
Win 7 64

MPC-HC
EVR CP

All default settings in svp and gpu accel. enabled.