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<blockquote data-quote="mrceolla" data-source="post: 695106" data-attributes="member: 109048">Thanks again for your reply.Why can PC video cards NOT lock the output to a video source like STBs, DVD players and VCRs?&nbsp; This is the part that puzzles me the most.I attempted to create custom resolutions with the Nvidia control panel but had no luck.&nbsp; No matter what I set it to the measured refresh rate was always showing 60.00##...&nbsp; So I started looking for other solutions.That brought me to PowerStrip.&nbsp; I was able to create custom timings in PowerStrip with did finally effect my measured refresh rate.&nbsp; After much trial and error of incrementing front porch, back porch, pixel clock, vertical refresh rate and one other thing I forgot, I was able to dial in 59.940 for vertical refresh frequency.&nbsp; At least that's the number PowerStrip reported.&nbsp; I went into Media Portal and played back some video and enabled the overlay.&nbsp; It now reported the measured refresh to be 59.943###.&nbsp; Pretty damn close, right?&nbsp; Stuttering/jitter is now very few and far between.&nbsp; The NST is somewhat regular.&nbsp; It will change rapidly but in very small increments.&nbsp; It will sometimes rise or lower very slowly but rarely reaching the threshold to cause a stutter.&nbsp; But every once and a while there is a seemingly large hickup.&nbsp; Not sure where that's coming from yet.&nbsp; So far this seems the best solution for me with TV and 5.1.&nbsp; Are you aware of any caveats with PowerStrip?What should that info overlay look like if everything is in perfect harmony?&nbsp; What should the numbers be and what should that graph look like?What is Stall?Does everyone with an HTPC experience these timing issues?&nbsp; Do most just not look for or notice them?Is there hope for the near future that these troublesome HTPC timing issues will be resolved?Thank you all for helping me get this far but I'm not through yet.&nbsp; I'm still going to strive for perfection although I'm not sure I'll ever achieve it.&nbsp; We'll see.&nbsp; I will continue to post my trials and results here and will of course gladly take any additional suggestions/advise.Mike</blockquote>

[QUOTE="mrceolla, post: 695106, member: 109048"] Thanks again for your reply. Why can PC video cards NOT lock the output to a video source like STBs, DVD players and VCRs? This is the part that puzzles me the most. I attempted to create custom resolutions with the Nvidia control panel but had no luck. No matter what I set it to the measured refresh rate was always showing 60.00##... So I started looking for other solutions. That brought me to PowerStrip. I was able to create custom timings in PowerStrip with did finally effect my measured refresh rate. After much trial and error of incrementing front porch, back porch, pixel clock, vertical refresh rate and one other thing I forgot, I was able to dial in 59.940 for vertical refresh frequency. At least that's the number PowerStrip reported. I went into Media Portal and played back some video and enabled the overlay. It now reported the measured refresh to be 59.943###. Pretty damn close, right? Stuttering/jitter is now very few and far between. The NST is somewhat regular. It will change rapidly but in very small increments. It will sometimes rise or lower very slowly but rarely reaching the threshold to cause a stutter. But every once and a while there is a seemingly large hickup. Not sure where that's coming from yet. So far this seems the best solution for me with TV and 5.1. Are you aware of any caveats with PowerStrip? What should that info overlay look like if everything is in perfect harmony? What should the numbers be and what should that graph look like? What is Stall? Does everyone with an HTPC experience these timing issues? Do most just not look for or notice them? Is there hope for the near future that these troublesome HTPC timing issues will be resolved? Thank you all for helping me get this far but I'm not through yet. I'm still going to strive for perfection although I'm not sure I'll ever achieve it. We'll see. I will continue to post my trials and results here and will of course gladly take any additional suggestions/advise. Mike [/QUOTE]

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