problem with screen refresh rate

[Dafik]

hello.

i've got a litlle problem with my screen refresh rate.

i've isntaled natit drivers for my GF7900GS and it works properly.

My NEC LCD 1701 also was instaled properly but i have problem with correct screen refresh rate.

There is only available two modes 60Hz and 75HZ but the best one for my lcd is 72Hz mode.

Is there any way to change refresh to 72Hz ?

It's hard to work on any of 2 available modes :/

[Danyel]

Hi Dafik:

 

I make changes to my screen resolution and refresh rate by modifying com.apple.Boot.plist file.

 

1) Go to Hard Drive - Applications - Utilities - Terminal

 

2) Type: cd /Library/Preferences/SystemConfiguration

 

3) Type: sudo pico com.apple.Boot.plist

 

4) Type in your password

 

5) Add the following lines (if not already added):

<key>Graphics Mode</key>

<string>1024x768x32@60</string>

6) The values between <string> and </string> are provided as an example. 1024 is Horizontal Resolution / 768 is Vertical Resolution / 32 is Bit Depth (amount of colors) / 60 is the Refresh Rate.

 

7) After making changes, type <CTRL> + O and <Return> to save your work.

 

8) Type <CTRL> + X to exit the file. Type: exit and <Return> to exit the Terminal.

 

9) Reboot your machine when ready and you'll (hopefully) have the desired Resolution, Depth and Refresh Rate.

 

--danyel

[Dafik]

it doesn't work

or no, it works but only on gray apple logo when computer is starting up but when osx starts screen gets back to 1280x1024 with 60Hz refresh :/

[grimdeath9740]

Hi Dafik:

 

I make changes to my screen resolution and refresh rate by modifying com.apple.Boot.plist file.

 

1) Go to Hard Drive - Applications - Utilities - Terminal

 

2) Type: cd /Library/Preferences/SystemConfiguration

 

3) Type: sudo pico com.apple.Boot.plist

 

4) Type in your password

 

5) Add the following lines (if not already added):

<key>Graphics Mode</key>

<string>1024x768x32@60</string>

6) The values between <string> and </string> are provided as an example. 1024 is Horizontal Resolution / 768 is Vertical Resolution / 32 is Bit Depth (amount of colors) / 60 is the Refresh Rate.

 

7) After making changes, type <CTRL> + O and <Return> to save your work.

 

8) Type <CTRL> + X to exit the file. Type: exit and <Return> to exit the Terminal.

 

9) Reboot your machine when ready and you'll (hopefully) have the desired Resolution, Depth and Refresh Rate.

 

--danyel

 

hmm so yea I was going to try this to see if hit helped with the same issue. instead I rebooted and now find my machine will not boot OSX! Instead when I get to the bootloader and choose OSX the screen goes black for a few seconds and then the computer reboots.

 

Any idea how to fix this, revert the change? I will be ticked if I just destroyed my install because it has been running perfect for over a month!