hooking up 1080p tv to video card

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Honestly, even if you can do 1080p through component it won't look that great. If you spent the money for a good mid/high end computer and a 1080p panel, it only makes sense to get the most out of it (HDMI, regardless of audio).
 
Yeah for the most part HDMI/DVI is the way to go, but as long as you're not scrimping on parts eventhe component output should be very close to the same.

Alot of it really comes down to the weakest link, and if you send HDMI or DVI over more than 15ft you start getting into issues as well, and personally I wouldn't mind the occasional analogue noise versus the starfield noise of a digital connection. However under 15ft even poor quality HDMI cable usually will give you a clean image, something that can be a problem with anything over 10ft with mediocre analogue cables.
 
It should. And this is the problem, with the number of TV setups out there it may still give you trouble, but it's not the interface that's the issue.

I have seen people complain about 1080P and 1080i TVs not working on every card since the R9xxx GFFX series. There's no reason why it shouldn't work, but as I mentioned before you may have the niggling issues everyone gets like overscan etc.

Funny thing is my HD2600 works like a charm 99.44% of the time, and then I plug it in at one location (work, GF's, etc.) and then return home and plug it into the 1080i TV and voila, can't get it to work right away, trouble detecting, etc. Reboot, doesn't work. Then change resolution, still doesn't work, then reboot, and voila, back to normal.

PC to TV is just annoying mainly because they don't follow the same standards and there are so many variables. But that being said, sometimes on my TV my HDMI connection or component connection won't properly recognize the HD/BluRay player or even the progressive DVD player and I get a Blue screen or weak signal until I turn on/off the TV, and those are supposed to be dumb industry standard parts. So it's not just PCs / Graphics Cards.

Anywhoo, it should have no trouble supporting that resolution through a DVI->HDMI dongle, but you may need to tinker and tweak to get it to work the way you want with your TV. Based on most people's feedback you may find yourself tweaking the advanced TV settings once you get it setup.
 
 
 
aylafan,

I want to build HTPC with ATI Radeon HD 4870. You mention that you use Sharp LCD. When you set your video card to 1920X1080, It will show full screen without black frame (underscan) at the side or without any picture crop at the side (overscan). I will use the HTPC with my sharp LCD 46 inch (1080p).
 



Your limitations are based on the amount of video memory your display card has. It has to be able to matc h the scan rate the display device is using at any given resolution. Modern HD TVs scan rates are much higher than most display cards put out unless they have specific inputs designed for VGA, These have internal Scan Converters to make the input display properly (ever notice how few TVs have more than one VGA input?). Super high end display cards with decent HDMI outputs are designed for proper input to the TV's circuitry. You could say it's the drivers, however the bottom line is the drivers only operate the needed hardware, and without sufficent video memory, and high speed video processors the drivers cant do a thing.