View Full Version : VGA-->Component Video ?
06-21-2005, 07:31 AM
I'm setting up another HTPC. The motherboard is based on Intel's GMA900 (http://www.intel.com/design/graphics/gma900/). I would like to output directly to my HDTV from the VGA.
I know that most Radeon cards can do this with an adapter (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3668&item=6776874426&rd=1&ssPageName=WD1V).
My question is this:
Can I use such an adapter on a GMA900 video output, or am I doomed to have to use another video card or (more expensive) adapter box?
AFAIK, the VGA interface has standard pinouts, so I would presume it would work with any card. I'd feel safe trying it, but let's see what others have to say.
06-21-2005, 08:20 AM
I imagine there would have to be something in the card to detect that it is HDTV so it can allow you to select from an appropriate resolution on the card.
I just bought a 6600GT Pci-e that came with the adaptor, but it was more a wire splitter than a connector.
06-21-2005, 08:26 AM
I too will feel reasonably safe trying it. The only thing that bugs me is the jumpers as shown on that eBay photo - maybe that sets some sort of a signaling mechanism to the ATI vid card? Not sure. But on principle it seems like it's just merely an adaptor - wires from VGA pinouts going to the component. VGA after all is RGB and so is component so I don't see any conversion going on inside the unit.
06-21-2005, 08:56 AM
OK...After quite a bit more homework (my head hurts)...
I found this site (http://www.avsforum.com/avs-vb/showthread.php?t=212199&page=2&pp=20) at AVS forums that talks about creating a VGA d-sub -->component cable.
I've also heard that the ATI adapter has an extra data-pin to activate Yrbrg on Radeon cards.
So, I'm inclined to make a homebrew cable and give it a whirl once I get the mobo (from newegg).
Anyone know how the voltages/resistances compare, on the VGA out and Yrbrg component inputs on HDTVs? (I would rather not fry my HDTV inputs).
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