1440x900@75Hz not supported on my monitor?

Question

Level 1

0 points

1440x900@75Hz not supported on my monitor?

Hello all, I have a Mac Mini bought from 2008, and I have it hooked up to my LCD monitor.

I have it set up right now at 1440x900 at 60Hz, but it doesn't seem to allow me to move it up to 75Hz. The thing is, though, this monitor definitely supports 1440x900 @75Hz. I have a Windows computer that uses this monitor too, and it can do 75Hz at the same resolution.

I have looked at the display settings in both Leopard and the most recent version of Snow Leopard, both are the same. They only allow me to go to 60Hz (in fact, 60Hz is the only non-grayed out option in the refresh choices).

The monitor is an Envision G19LWK. It is hooked up through a DVI cable.

What is the problem here? Is there a way to override this?

Mac Mini - 2Ghz C2D / 2GB RAM / Intel GMA 950, Mac OS X (10.6.1)

Posted on Oct 15, 2009 7:36 PM

Reply

Answer 1

Best reply

Euchre

Level 4

1,275 points

Oct 16, 2009 11:14 AM in response to Mjolnir1134

I see from the manufacturer's specs that your display definitely supports 75hz refresh. The drivers Apple uses for it may not be designed to however. There is a utility SwitchResX that can force certain resolutions and modes if you wish.

Reply

Answer 2

Mjolnir1134 Author

Level 1

0 points

Oct 24, 2009 12:19 AM in response to Euchre

Hello Euchre, thanks for the reply, and sorry for the late response.

I tried out that program, but whenever I set it to run at 75Hz, the screen stays blank. I have to reboot the Mac to get it back to a working display resolution and refresh rate.

However, it seems I've solved the little problem here on my own. Hooking it up via VGA oddly enough allows me to run it at 75Hz. The reasoning behind this is beyond me, but its nice to see things move around at this refresh rate.

Message was edited by: Mjolnir1134

Reply

Answer 3

Mjolnir1134 Author

Level 1

0 points

Oct 24, 2009 12:20 AM in response to Mjolnir1134

Hook it up via VGA if DVI doesn't do the trick.

Reply

Answer 4

BSteely

Level 5

7,643 points

Oct 24, 2009 3:41 PM in response to Mjolnir1134

Mjoinir, I'd like to point out that you are probably best off running DVI at 60Hz than VGA at 75Hz. The reason is LCD panels have a timing controller in them and they refresh at a fixed 60 Hz regardless of what the input is. So even though you think you are enjoying 75 Hz refresh, it's a placebo affect. The panel is running at 60 Hz.

Reply