Can't get higher than 30hz refresh rate on my 32" lcd tv

alg1a · 28 Mar 2008 at 14:11

As in title the maximum refresh rate available is only 30hz over HDMI and I'm using vista ultimate 32bit. When I try to update driver it says the best driver is already installed and its the generic plug and play monitor driver. TV is JVC LT-32DA8 which is hd ready 1080i and has no pc input just 2 HDMI ports.

helmutcheese · 28 Mar 2008 at 15:58

You sure its not 30hz x2 so really outputing at 60hz as Some recent Nvidias Drivers reported my HZ to TV as 25hz, but its really 50hz.

alg1a · 28 Mar 2008 at 16:24

It says 30hz, interlaced

helmutcheese · 28 Mar 2008 at 16:25

hmm, was hoping you would not say that lol.

As you know all LCD's are by nature Progressive even a 1080i HDTV outputs to Progressive.

Whats your GPU ?.

alg1a · 28 Mar 2008 at 16:41

Onboard XFX nforce 630i/7150.

helmutcheese · 28 Mar 2008 at 16:42

All I can suggest is Google or directly on Nvidia forums, I bet your not alone.

james.miller · 28 Mar 2008 at 16:47

1080i is an interlaced resolution, ergo it will be 25or 30hz. if you want 50/60hz you'll have to feed the tv with a progressive resolution, which in your case would be 576p or 720p.

alg1a · 28 Mar 2008 at 18:57

How do I feed with progressive scan.

james.miller · 28 Mar 2008 at 19:08

change the resolution to 1280x720. or 1360x768/133x768 if the tv supports it. the card will handle the interlaced/progressive switching

alg1a · 28 Mar 2008 at 20:41

Thx James, only 1280x720 seems to work,1360x768 still has 30hz max although tv supports it. Also screen does not fit properly @ 1280x720.

alg1a · 28 Mar 2008 at 22:42

After some googling I found this in one thread:

"Most TVs don't accept non-HD resolutions via HDMI. The only way you can get full resolution is to use the VGA port. Otherwise you'll get 720 x 1280 scaled to 768 x 1360 which could be ugly".