DVI to HDMI lowers quality?

Doomy · 12 Jul 2007 at 03:31

I have an 1900XTX that I have hooked up via DVI-HDMI cable to get 1080p films on my Sharp XD1E 42". My PS3 runs at 1920x1080 60hz no problem. I cannot get this resolution and refresh rate to fill my screen, leaves a centimeter border around the edge of the screen. It fills the screen if I select 50hz but it looks no where near as nice as my PS3 obviously. Has anyone found a way of doing this? I have the latest 7.6 drivers.

I should add theres a FPD2185W Gateway monitor hooked up to the other DVI out on card too.

Doomy · 12 Jul 2007 at 13:24

The amount of searching I have done suggests this too. Guess I need to work out how to do this on my sets settings. I did look but nothing seemed to suggest 1:1, reading the manual is probably my best bet but my XD1E only supports 1080p via hdmi and the PS3 sets up without any settings adjustment.

I am sure my tv supports 1:1 tho. Thanks for help anyway

Doomy · 12 Jul 2007 at 21:25

squiffy said:
I had that same Sharp. With a ATI you might need to disable "DVI high frequency output" otherwise you'll get no signal at 1920x1080 @ 60hz. It depends, I had ATI X300 and ATI X1900XT, for X300 had to disable it, X1900XT didn't.

Also try 75hz, for some reason this works.
And use the ratio button on the sharp's remote flap, one of them will give it 1:1.

Bring up a net page, disable cleartype and you should spot when it's 1:1.

This is what I have tried so far

I get a signal at 1920x1080@60hz. It quite clearly isnt and it shrinks the picture and with the ratio button I have 2 settings, underscan (the one i believe I need) and full widescreen. Underscan gives me 10mm at the top missing and full gives me 30mm or so.

Ill try the other options suggested though, cheers again. Hellbent on getting this to work.

Doomy · 12 Jul 2007 at 23:00

Are you doing this in CCC or something like Powerstrip? Cant seem to force 75hz in CCC the option is not even there.

Doomy · 13 Jul 2007 at 02:25

How utterly frustrating. Sat here on my lounge floor watching a stunning 1080p version of Black Hawk Down via my pc. Why I hear you ask? Because its coming from my emergency PCI nVidia 6200 Go. Scaled immediately to the right resolution and straight to 60hz. And I am blown away by it. Theres an intermitent judder, 1 frame or so every 10 secs but I can forgive my card for that seeing as its poo. Yet better than the beast above it in the PCI-E slot.

I am banging my head against the wall here, I have tried all the helpful suggestions in this post and a few others elsewhere and it just plain downright refuses to show 60hz nicely, nor 75. I am so tempted to just trade my ATI in for an nvidia equivalent unless someone really nice can take 30 mins to walk me through it.

Does anyone else have any ideas as to what I could try next?

Doomy · 14 Jul 2007 at 14:02

Im pretty sure it isnt. Can the card not output a 16:9 AND a 16:10, is that what you are saying? My monitor is 16:10 (hence the 1650x1080 res) but my tv is 16:9.

Doomy · 14 Jul 2007 at 16:05

Well thanks a lot peeps, I didnt chance upon that thread till today (cheers kipper67), it looks like an ATI driver issue that is being worked on since february, hopefully the 7.7's will remedy my problems.

I was lead to believe that ATI had the best TV support for ages but this seems to have flipped to nVidia for now, was tempting to trade for a 7900 to fix this immediately but I think I'll hang on for a bit. Just frustrating after watching a few Blurays from my PS3 and seeing how god damned nice they look. Im aware I can stream from my PS3 but file conversion is something id like to not have to do.

My PC is so close to my TV now that it seems pointless to have a dedicated HTPC running things but if the issues arent sorted out by the next update I'd be tempted to go nVidia route just to avoid the hassles, both make good cards but I need something pretty much urgently being highly impatient.

Doomy · 14 Jul 2007 at 16:17

At least I wont have to contend with Vista issues or id probably be further bak in time with the problems I have now lol. nVidiots, heh.

Doomy · 14 Jul 2007 at 16:43

There is an exe which fixes underscan problems on that thread. Works a treat for me. I didnt think it would but PapaSloth on that avsforum deserves a big fat sloppy kiss. Got it running perfectly now but im scared to reboot now its working, I sincerely hope there is an official fix with the 7.7s which are due out nowish I guess.

Grab it here if its needed by anyone else.