Urgent Help Pls - ATI 4890 to HDTV

DannyW · 22 Oct 2009 at 19:52

Hi guys

Ive just bought an ATI 4890 graphics card

I am connecting it to my LG 1080p TV with a decent DVI to HDMI cable

My problem is the pictures wont scale to the full size of the TV

Never had this problem with my Nvidia, always scaled in any resolution and looked great

Does anyone know what to do, playing about with the drivers ect cant get it to work. Even in the BIOS screen it doesnt scale just has about an inch of black around everything

Cheers

Th3D0n · 22 Oct 2009 at 20:19

Iv got a 4850 connected to my 47" 1080p tv and it works fine but im using the dvi to hdmi converter and a hdmi cable

wiak · 22 Oct 2009 at 20:23

try set the tv in 50hz or check out the underscan/overscan scaling in catalyst

Engram · 22 Oct 2009 at 20:27

Check all the underscan/overscan settings on the TV too.

asim18 · 22 Oct 2009 at 20:31

I have my 4890 with my 1080p sammy LCD and it's pixel perfect.

I disabled the under/overscan in the ATI CCC.

And I also set my TV to "Just Scan" which disables the TV's inbuilt scaling and allows 1:1 pixel mapping.

kylew · 22 Oct 2009 at 20:42

There's no such thing as a decent HDMI cable, it either works, or it doesn't. Doesn't ranges from corrupted picture to nothing at all.

Anyway, to answer your question, you'll need to do this:

Set the slider to the very right and the image will fill your screen.

DannyW · 22 Oct 2009 at 20:47

Hi

I managed to get it to scale properly BUT

the image and text quality was very poor and blury almost un-readable

any ideas?

that was at 1920x1080 @ 50hz and 60hz

asim18 · 22 Oct 2009 at 20:49

DannyW said:
Hi

I managed to get it to scale properly BUT

the image and text quality was very poor and blury almost un-readable

any ideas?

that was at 1920x1080 @ 50hz and 60hz

Are you sure the TV is actually 1080p? and that it doesn't just "support" a 1080p signal?

It should be pixel sharp.

DannyW · 22 Oct 2009 at 20:50

yes is deffo 1080p

Ive used it with a 7800gt and it is pixel sharp ive been using it for 2 months

the tv is an LG 32LH3010

kylew · 22 Oct 2009 at 20:58

My TV is pixel sharp running off my 4850, so it's not an ATi-TV issue.

Also make sure that it's definitely running at 60Hz, as I've had issues with my TV pretending it's running at 60 but it was actually running at 30 interlaced.

wiak · 22 Oct 2009 at 21:47

i have no issues with my HD 4870 and HD 3200 and HD 3450 using my Sony Bravia KDL-40W2000 40" 1080p, i just set it to 1080p 50hz or 60hz, and set scaling to 0

btw check your manual and the tv settings, there should be a enable 1:1 pixelmapping aka Exact scan, Full Pixel or Just Scan

also try feeding the TV a 720p signal and see if that is any better

Engram · 23 Oct 2009 at 08:32

DannyW said:
Hi

I managed to get it to scale properly BUT

the image and text quality was very poor and blury almost un-readable

any ideas?

that was at 1920x1080 @ 50hz and 60hz

Does the TV have a "sharpness" setting that has been turned up? If so turn it down to zero/off.

tindale · 23 Oct 2009 at 08:53

Good point about sharpness ^^

Have you dissabled overscan? I've always had a problem where CCC tries to shrink my image by 15%, so it's too small and not pixel mapped. When I first got round this I set my Sony Bravia to stretch the image to fit the screen, but this is wrong, as you're using the TV sto stretch an image which isn't perfect.

Make sure your TV is set to 1:1 pixel mapping, and try to resolve any problems at the PC end. If you need help with your TV, I'm sure avforums will have a guide for it, they seem to do so for most models.

DannyW · 23 Oct 2009 at 13:44

Bought an Nvidia BGF GTX 260 problems solved

Anyone wanna buy a 1 Day old 4890 lol

Engram · 23 Oct 2009 at 14:18

DannyW said:
Bought an Nvidia BGF GTX 260 problems solved

Anyone wanna buy a 1 Day old 4890 lol

Well that's one way to solve it!!

sunderland · 23 Oct 2009 at 16:28

DannyW said:
Bought an Nvidia BGF GTX 260 problems solved

Anyone wanna buy a 1 Day old 4890 lol

danny so the 260 scaled with no probs then m8 as ive got onboard 4200 ati and had the same problem,so when i set it to overscan a touch it does it but picture is not the best,was going to buy a 5850 on monday aswell but might go for another nvidia if thats the case

DannyW · 23 Oct 2009 at 16:51

ive always prefered nvidia tbh but thats another argument lol

every ati card i've ever bought ive had problems with

wiak · 24 Oct 2009 at 09:56

Engram said:
Does the TV have a "sharpness" setting that has been turned up? If so turn it down to zero/off.

mpeg2 deblocking also can realy mess up quality and its on by default on some tvs

james.miller · 24 Oct 2009 at 09:59

no reason why it should be looking poor as it shouldnt be scaling anything at 1080p.

dragy2k · 24 Oct 2009 at 10:41

the post made me laugh......got a problem ....solve it by buying a different card lol ....fyi it was a very very easy fix .......nvidia ...no thinking required lol ..if im quick i should (tm) that quote lol