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<blockquote data-quote="Tech Geek" data-source="post: 37826" data-attributes="member: 18181"><p>BTW, after some looking... the formula I used is wrong. DDR 400 is 200MHz * 2 data transfers per clock rather than 400MHz with 2 transfers. So all those bandwidths would be half of what I posted. In other words... it takes a card with a memory buss of 625 or higher to achive the bandwidth Microsoft wants for HDTV in VMR9 with a 128bit memory grahics card.</p><p>With a 256 bit card it would be half that.</p><p>As far as I could tell, if you want to go with passsive cooling and HDTV you must go 256bit on the graphics card to meet the Microsoft spec.</p><p></p><p>That should probably be in a guide somewhere.</p><p></p><p>The *only* passively cooled card under $200 that meets the 10GB/sec requirement (that I found) is the HIS Hightech H130H512N Radeon X1300 512MB 256-bit GDDR2 PCI Express x16 CrossFire Ready Video Card priced at $120. </p><p></p><p><a href="http://www.newegg.com/Product/Product.asp?Item=N82E16814161167" target="_blank">http://www.newegg.com/Product/Product.asp?Item=N82E16814161167</a></p></blockquote><p></p>
[QUOTE="Tech Geek, post: 37826, member: 18181"] BTW, after some looking... the formula I used is wrong. DDR 400 is 200MHz * 2 data transfers per clock rather than 400MHz with 2 transfers. So all those bandwidths would be half of what I posted. In other words... it takes a card with a memory buss of 625 or higher to achive the bandwidth Microsoft wants for HDTV in VMR9 with a 128bit memory grahics card. With a 256 bit card it would be half that. As far as I could tell, if you want to go with passsive cooling and HDTV you must go 256bit on the graphics card to meet the Microsoft spec. That should probably be in a guide somewhere. The *only* passively cooled card under $200 that meets the 10GB/sec requirement (that I found) is the HIS Hightech H130H512N Radeon X1300 512MB 256-bit GDDR2 PCI Express x16 CrossFire Ready Video Card priced at $120. [url]http://www.newegg.com/Product/Product.asp?Item=N82E16814161167[/url] [/QUOTE]
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