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<blockquote data-quote="Owlsroost" data-source="post: 923822" data-attributes="member: 83973">Basically, DWM = Desktop Window Manager = Aero.&nbsp;It operates in two modes - the default mode where there is no 'presentation' queue (of rendered video/graphics frames, coming from MP in our case) or the optional mode with the presentation queue enabled. The queue length is set by the 'NumDWMBuffers' reg value, and this queue of frame buffers is between MP and the screen.&nbsp;In theory more buffers might help to avoid dropped frames after MP (which won't show up in the render stats), but I've never noticed much difference in performance between 3 and larger amounts (3 has always been the default). Also more buffers use up more GPU memory.&nbsp;Because the queue is after dshowhelper (where the video part of A/V sync is controlled), as far as I know it creates a delay to the video of (queue length * display frame time) i.e. the longer the queue the greater the delay.&nbsp;Hope that helps <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp;Tony</blockquote>

[QUOTE="Owlsroost, post: 923822, member: 83973"] Basically, DWM = Desktop Window Manager = Aero. It operates in two modes - the default mode where there is no 'presentation' queue (of rendered video/graphics frames, coming from MP in our case) or the optional mode with the presentation queue enabled. The queue length is set by the 'NumDWMBuffers' reg value, and this queue of frame buffers is between MP and the screen. In theory more buffers might help to avoid dropped frames after MP (which won't show up in the render stats), but I've never noticed much difference in performance between 3 and larger amounts (3 has always been the default). Also more buffers use up more GPU memory. Because the queue is after dshowhelper (where the video part of A/V sync is controlled), as far as I know it creates a delay to the video of (queue length * display frame time) i.e. the longer the queue the greater the delay. Hope that helps :) Tony [/QUOTE]

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