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<blockquote data-quote="kszabo" data-source="post: 317275" data-attributes="member: 61646">It´s wait for vertical refresh. It is also called v-sync. I don´t think this is importan for DXVA. It is good against tearing in VMR9 and XP. I did not notice any difference changing this with Vista/EVR/CCC8.9/PDVD7.3.greetingsI think all of you should consider using Vista. The newer ATi/AMD chipsets has much better drivers (Catalyst) for Vista than for XP (examples: freeze of MP skins with reflections, no Hybrid-XFire for XP etc). Vista have EVR, XP does not (not really even with .Net 3.5). Vista has DXVA 2.0, XP only DXVA 1.0 (Info: <a href="http://en.wikipedia.org/wiki/DirectX_Video_Acceleration" target="_blank">DirectX Video Acceleration - Wikipedia, the free encyclopedia</a>) Everybody on your list having no DXVA use XP <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />I don´t think that good and stable DXVA with Mediaportal is possible with Windows XP. Give Vista a try!Once again what you need for DXVA up to 1080i/p:- Vista 32bit, not XP- EVR as renderer- 780G/HD3200- HT3.0 CPU (Phenom) - not absolutely needed for SD but more stable- PowerDVD 7.3 or 8.0 with latest patch- Catalyst 8.9 or 8.10 (everything set to default, no tweak needed)- DXVA enabled for PDVD codec (in MP direct show controls)</blockquote>

[QUOTE="kszabo, post: 317275, member: 61646"] It´s wait for vertical refresh. It is also called v-sync. I don´t think this is importan for DXVA. It is good against tearing in VMR9 and XP. I did not notice any difference changing this with Vista/EVR/CCC8.9/PDVD7.3. greetings [B] I think all of you should consider using Vista. [/B] The newer ATi/AMD chipsets has much better drivers (Catalyst) for Vista than for XP (examples: freeze of MP skins with reflections, no Hybrid-XFire for XP etc). Vista have EVR, XP does not (not really even with .Net 3.5). Vista has DXVA 2.0, XP only DXVA 1.0 (Info: [url=http://en.wikipedia.org/wiki/DirectX_Video_Acceleration]DirectX Video Acceleration - Wikipedia, the free encyclopedia[/url]) Everybody on your list having no DXVA use XP :) I don´t think that good and stable DXVA with Mediaportal is possible with Windows XP. Give Vista a try! [B] Once again what you need for DXVA up to 1080i/p:[/B] - Vista 32bit, not XP - EVR as renderer - 780G/HD3200 - HT3.0 CPU (Phenom) - not absolutely needed for SD but more stable - PowerDVD 7.3 or 8.0 with latest patch - Catalyst 8.9 or 8.10 (everything set to default, no tweak needed) - DXVA enabled for PDVD codec (in MP direct show controls) [/QUOTE]

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