In some cases the V-synced buffer strategy doesn't perform as well as
expected - the animation doesn't look smooth all the time.
It looks like this depends on whether some application in the system uses
high resolution timer or not.
We should use D3DPRESENT_INTERVAL_ONE presentation interval instead of
D3DPRESENT_INTERVAL_DEFAULT for v-synced swap chains to get more
precise v-sync tracking (at the expense of slightly higher cpu