http://blogs.msdn.com/shawnhar/archive/2007/11/23/game-timing-in-xna-game-studio-2-0.aspxIn a previous post I explained how the game timing system works when Game.IsFixedTimeStep is set to true: We will call your Update method exactly 60 times per second We will call your Draw method whenever we feel like it This is still true in the 2.0enCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/shawnhar/archive/2007/11/23/game-timing-in-xna-game-studio-2-0.aspx#6501213Sat, 24 Nov 2007 16:30:03 GMT91d46819-8472-40ad-a661-2c78acb4018c:6501213Ultrahead<p>No wonder I was &quot;pushed&quot; to measure the update calls instead of the draw ones ... the latter was giving me misleading numbers.</p> http://blogs.msdn.com/shawnhar/archive/2007/11/23/game-timing-in-xna-game-studio-2-0.aspx#6808027Wed, 19 Dec 2007 20:12:16 GMT91d46819-8472-40ad-a661-2c78acb4018c:6808027mike.cann<p>Cheers for this info Shawn i had wondered why my FPS timing in XNA 1.0 had never been as accurate as i had wished.</p> <p>I have now changed the way i am doing FPS timings in XNA 2.0 and now get accurate FPS data even when running in fixed timestep :)</p> <p>If its okay i have a link to my website where i have put up a blank project with the FPS timing code in it here: </p> <p><a rel="nofollow" target="_new" href="http://www.artificial-studios.co.uk/?p=225">http://www.artificial-studios.co.uk/?p=225</a> </p> http://blogs.msdn.com/shawnhar/archive/2007/11/23/game-timing-in-xna-game-studio-2-0.aspx#7687768Thu, 14 Feb 2008 10:26:59 GMT91d46819-8472-40ad-a661-2c78acb4018c:7687768Jerry Hong<p>Could you should some flow diagram about the 'draw', 'update' and 'retrace of 75Hz'? That's confused. Thanks</p>