Tom's Hardware > Forum > Graphic & Displays > TV/Video Cards > VGA vs. HDMI
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thekillersfan   08-24-2008 at 07:03:33 PM

Hi everyone,

So I am having a problem connecting my computer (eg. xfs 8800gt) to my tv (eg. Sony 52" BRAVIA 1080p HDTV) so whenever i connect the computer through vga table to the tv (vga port), it works on full resolution. However, if I connect the tv through a cable to is one end dvi and the other HDMI (to hdmi port), it doesnt give me the same resolution.

Anyone know whats wrong and why?

Cheers,
Maxim

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juvealert   08-24-2008 at 07:12:41 PM
- 0 +

Did u change the desktop resolution from your pc ?

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blackhawk1928   08-24-2008 at 07:25:30 PM
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technically dvi is supposed to give you much much more resolution, it is very strange why it goes down for you, very very strange.

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thekillersfan   08-24-2008 at 07:44:14 PM
- 0 +

Yes, I changed the resolution to the highest possible in both cases. It switches it back down by itself, even though I hit the keep resolution button. It is strange, any ideas?

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teh_boxzor   08-24-2008 at 07:49:24 PM
- 0 +

go in nvidia control panel and set custom resolution?

------------------------------ | Athlon x2 5000+ @ 3.2 | Biostar Tforce 570 sli | Sli 9800GT | 2x 512mb Corsair xms ddr2-800 | 2x 512mb Crucial Tracers ddr-800 | Antec 900 | 22" HannSpree | Creative Itrigue 3000 | PS triple
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hixbot   08-24-2008 at 08:19:22 PM
- 0 +

Your tv may scale the picture differently for different inputs.

Or perhaps its the HDCP chip that isn't happy.

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thekillersfan   08-24-2008 at 08:21:30 PM
- 0 +

I tried the custom resolution as well in the control panel.

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teh_boxzor   08-24-2008 at 08:28:29 PM
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yeah than your hdcp chip is preventing it because hdcp downscales when it senses one of the components isnt hdcp compliant. check your video card to see if its hdcp compliant and your monitor too.

------------------------------ | Athlon x2 5000+ @ 3.2 | Biostar Tforce 570 sli | Sli 9800GT | 2x 512mb Corsair xms ddr2-800 | 2x 512mb Crucial Tracers ddr-800 | Antec 900 | 22" HannSpree | Creative Itrigue 3000 | PS triple
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atomicWAR   08-24-2008 at 08:42:57 PM
- 0 +

hdcp can be a pain...i agree with boxzor and hixbot. Its your most likely culprit. Possible its a driver issue (had similar experience with 3870x2 running on the exact same model TV which you speak) though i was able to get it working after about twenty minutes of tinkering. (ie flashing bioses, updating drivers...etc)

an 8800gt should be hdcp complient (question is which version and what version does your TV run). If your TV has a newer spec, your basically screwed tell u upgrade.


Message edited by atomicWAR on 08-24-2008 at 08:46:03 PM
------------------------------ Anywho back on planet earth where chaos reign's supreme....

http://service.futuremark.com/compare?3dm06=6357314
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teh_boxzor   08-24-2008 at 09:06:47 PM
- 0 +

i dont think the early 8800gt's were hdcp compliant. although i could be wrong.

------------------------------ | Athlon x2 5000+ @ 3.2 | Biostar Tforce 570 sli | Sli 9800GT | 2x 512mb Corsair xms ddr2-800 | 2x 512mb Crucial Tracers ddr-800 | Antec 900 | 22" HannSpree | Creative Itrigue 3000 | PS triple
 Reply to teh_boxzor
atomicWAR   08-25-2008 at 12:09:22 AM
- 0 +

personally i don't recall ever seeing an 8800gt listed specs that wasn't HDCP complient....could be a possiblity all the same though considering how many of those cards flew off the shelves during it's release leaving many people in wait for new stocks. Well that or what i mentioned above are the only likely culprits that come to mind. best of luck to you killersfan.

------------------------------ Anywho back on planet earth where chaos reign's supreme....

http://service.futuremark.com/compare?3dm06=6357314
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