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<blockquote data-quote="Commodore 64" data-source="post: 58920" data-attributes="member: 13303">Microsoft says 10GB//sec memory bandwidth is needed for HD playback with VMR9. Your 256Mb 6600 almost certainly does not have 10GB/sec memory bandwidth. And without that you will get stuttering in HDTV with VMR9.I've been through the ringer with this issue.&nbsp; For me to resolve the stutter went something like this:r8500--&gt;r9600pro--&gt;r9700pro--&gt;nV6200--&gt;nv6600GT.All of the above cards could provide smooth playback of 1080i content with VMR7, but it looked pretty subpar, IMHO.&nbsp; It was slightly blurry and motion just wasn't quite smooth. Note that the r9700pro vastly exceeds the 10GB/sec, but I could not get smooth playback with it. After much frustration and a few posts at AVS forums, I chalked it up tot he 9700pro not being optimized for VMR9.&nbsp; It wasn't until I put in the 6600GT that my HTPC became truly awesome.No more microstutters in DVDs, crystal clear, stutter-free 1080i playback, fantastic hardware upscaling of Xvid, h264, and DVDs to 1920 x 1080i...These days I advise a 7600GT or better.&nbsp; Sometimes you can find 6600GT pretty cheap. Whatever you do, make sure you check the memory bandwith and bus width on those cards&nbsp; 64-bit memory will KILL you.&nbsp; And at 128-bit&nbsp; you need a pretty high clock on the memory to get 10GB/sec.</blockquote>

[QUOTE="Commodore 64, post: 58920, member: 13303"] Microsoft says 10GB//sec memory bandwidth is needed for HD playback with VMR9. Your 256Mb 6600 almost certainly does not have 10GB/sec memory bandwidth. And without that you will get stuttering in HDTV with VMR9. I've been through the ringer with this issue. For me to resolve the stutter went something like this: r8500-->r9600pro-->r9700pro-->nV6200-->nv6600GT. All of the above cards could provide smooth playback of 1080i content with VMR7, but it looked pretty subpar, IMHO. It was slightly blurry and motion just wasn't quite smooth. Note that the r9700pro vastly exceeds the 10GB/sec, but I could not get smooth playback with it. After much frustration and a few posts at AVS forums, I chalked it up tot he 9700pro not being optimized for VMR9. It wasn't until I put in the 6600GT that my HTPC became truly awesome. No more microstutters in DVDs, crystal clear, stutter-free 1080i playback, fantastic hardware upscaling of Xvid, h264, and DVDs to 1920 x 1080i... These days I advise a 7600GT or better. Sometimes you can find 6600GT pretty cheap. Whatever you do, [b]make sure you check the memory bandwith and bus width on those cards[/b] 64-bit memory will KILL you. And at 128-bit you need a pretty high clock on the memory to get 10GB/sec. [/QUOTE]

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