View Full Version : G74Sx - HDMI 1440p @60Hz

08-27-2013, 08:44 AM
Hi All,
I have been trying to get 1440p out of the G74 to my Dell-U2711 LCD screen yet there is no display port or DualLink DVI output on G74.

Fortunately, i have researched and successfully worked around with HDMI so i would like to share this here.

This will work with any Monitor support 1440p.

1. a HDMI 1.3 and later cable ( make sure it say HI-SPEED), mine is Sony 1.4, cost arround 15USD for a 3m long flat cable. (Picture1)
2. Latest Nvidia driver, mine is V7.2.710
3. Check your maximum LCD resolution

1. Plug in the HDMI cable and connect it with the LCD, the computer will detect and clone your view
2. Go to display setting and choose Extend these displays (Capture1.jpg), hit OK, it will extend the view. However, the HDMI port from G74 only send out 1080p signal, and there is no way for you to choose higher resolution
3. Go to Nvidia Control Panel by right click on desktop and choose it, Go to Display tab, select your LCD monitor and Hit Customize (Capture2.jpg). If the customize button does not light up, just close the control panel and open it again
4. Now create a new Custom resolution as per your LCD native display (normally 2560x1440 or 2560x1600 at 50hz or 60hz)
Make sure you choose CVT REDUCED BLANK in the Timing, then hit TEST (Capture3.jpg)
You will see the LCD change to the resolution that you just created. Make sure it crytal clear pixel edge. If not, there would be something wrong with your setting table.
5. During the test there will be a small screen counting down from 10, if you find it is what you are looking for, just hit Yes then save it.
You might find the Nvidia control panel freeze, just go to task manager to force it close
6. Go back to the Customize tab and Tick the Custom resolution you just created, and choose Enable resolution not exposed by the display, hit OK
7. It will go back to Nvidia control panel, choose the display, and the Resolution list you will see under Custom there is a new resolution you created, choose it and hit apply.

The one on my show DVI-PC display as i am using an adaptor HDMI-DVI as i save the HDMI port for my other PC. But as i tested, it works on HDMI in for my Dell U2711.
Maximun Digital output as stated for GTX 560m is 2560x1600, so before doing this, check your LCD and make sure do not go anything higher than this.

G74 HDMI is 1.4 (upto 2k) however the driver by default limit selection and give HDMI only maximum of 1080p, this trick force the HDMI send signal 1440p out to the LCD display, if you do correctly , you can check the signal on the LCD by using Display information on your LCD setting (Picture 2.jpg)

This trick works on G73 and other laptop that support 1440p as well

08-27-2013, 10:21 AM
+rep for a good tutorial, and a good find! Thanks. I would recommend that you use 60 Hz, since that's the standard, and it keeps your internal and external cards in sync for refreshing.

08-28-2013, 05:23 AM
i don't know why but somehow my post disappear. So, i re-post it briefly as below, will upload pictures later as i need to capture the pictures again.


Since the post recovered so i delete this duplication