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Monitor not showing 120hz! Need help with my G75V and an external monitor. URGENT

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  • External Monitor
  • Monitors
  • Graphics
Last response: in Graphics & Displays
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October 16, 2014 4:26:22 AM

Hello everyone!

I have today just acquired my new Monitor, BenQ XL2411Z which supports up to 144hz.

I wanna run 120hz on my external monitor, and then the laptop monitor off.

Problem is, I can find resolutions like 800x600 and 640x480 which can run 120hz, but I can't find any 1920x1080 120hz resolutions.
I have tried to create a custom resolution with 1920x1080 120hz, but my GPU driver just stops working.

I am connecting my screen through Mini DisplayPort -> DVI Dual Link.
I have updated every driver, and my screen's isn't listed as a PnP screen.

So yearh, I was kinda hoping anyone of you could help me out, as I would really love to run this thing in 120hz in a higher resolution than 800x600 or 640x480 120hz.


TLDR: I wanna use my BenQ XL2411Z with my G75V and run 120hz on a decent resolution. No dual screen, external monitor will be the only one to get used.

More about : monitor showing 120hz g75v external monitor urgent

a b C Monitor
October 16, 2014 4:43:32 AM

Ensure the cable is tightly connected and the monitor driver is installed.

I'm guessing a driver is required if it is not a pnp device. Also try the game mode loader software and S switch.
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October 16, 2014 5:01:47 AM

Thanks Huilun02, I will just try that and then write back what's happened.
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Related resources
October 16, 2014 5:20:06 AM

huilun02 said:
Ensure the cable is tightly connected and the monitor driver is installed.

I'm guessing a driver is required if it is not a pnp device. Also try the game mode loader software and S switch.


I have just checked, and the cables is tightly connected, and I just used the following CD disc to install the monitor driver.

And at first they were both called "Standard PnP Skærm" Skærm=Screen
But after I installed the driver, it got renamed to this http://i.imgur.com/TVheNu3.png


And this is what I mean
I can chose 1920x1080 but only with 60hz - http://i.imgur.com/IWKjQ6U.png

But I can also choose 800x600 and then get 120hz - http://i.imgur.com/8anqS3q.png

I don't know what to do with the game loader program, I downloaded it, but I don't see a way to use it to fix my problem, and the S Switch is not something that is on the XL2411Z model.

Any other suggestions?
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a b C Monitor
October 16, 2014 5:23:01 AM

Have you made it so the external monitor is the only display used under video properties? If you're just turning off the screen before doing this, the laptop screen will still be set as priority.
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October 16, 2014 5:25:38 AM

boju said:
Have you made it so the external monitor is the only display used under video properties? If you're just turning off the screen before doing this, the laptop screen will still be set as priority.


I have set my 2nd screen as the only screen.

http://i.imgur.com/Dw5Exbh.png

The number 1 screen is my laptop, the number 2. screen is my external monitor

So it should be turned off.

Just to help you, the last part where it says "Flere skærme: Vis kun på skrivebord 2" "More screens: Show only on desktop 2"

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a b C Monitor
October 16, 2014 5:27:31 AM

Yea sorry, i was still in the middle of posting when i seen your 2nd last post.

Now that you have installed the monitor driver, have you tried clicking the detect/identify buttons under Display\Screen Resolution?
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October 16, 2014 5:30:52 AM

boju said:
Yea sorry, i was still in the middle of posting when i seen your 2nd last post.

Now that you have installed the monitor driver, have you tried clicking the detect/identify buttons under Display\Screen Resolution?


When I press them, a big "2" just appears, and then when i press identify, it just says that there is no other screens detected.

- http://i.imgur.com/2dbZ089.png
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a b C Monitor
October 16, 2014 5:34:26 AM

Thats a BIG 2. lol. Sorry, if i find anything more to try i'll let you know, good luck.
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October 16, 2014 5:36:22 AM

boju said:
Yea sorry, i was still in the middle of posting when i seen your 2nd last post.

Now that you have installed the monitor driver, have you tried clicking the detect/identify buttons under Display\Screen Resolution?


boju said:
Thats a BIG 2. lol. Sorry, if i find anything more to try i'll let you know, good luck.


Thanks for trying mate, if you get any ideas, please let me know :) 
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a b C Monitor
October 16, 2014 5:39:09 AM

At any point after your discovery of this problem, did you restart at least once?
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October 16, 2014 5:44:34 AM

Huilun02, facepalm...

Well, I will just try that and then return to you!
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October 16, 2014 6:23:56 AM

huilun02 said:
At any point after your discovery of this problem, did you restart at least once?


Nothing happened after a reboot.

I can't choose 120hz in any settings.
I tried to create a custom resolution, with 1920x1080p 120hz but my screen driver still stops working when doing so.

I'm completely out of ideas on what to do
Everything is updated etc.
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a b C Monitor
October 16, 2014 6:29:26 AM

Maybe reinstall your GPU driver? Apart from that I'm clueless.
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October 16, 2014 6:32:48 AM

huilun02 said:
Maybe reinstall your GPU driver? Apart from that I'm clueless.


I just installed the driver again for my 670 GPU :/ 
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a b C Monitor
October 16, 2014 6:50:25 AM

I'm seeing around the net the Asus G75V is more than capable of doing 120hz with the mini dp to dual link dvi. I'm just wondering whether the cable adapter you're using is dodgy, sorry to drop that on you, it just seems a bit odd there's quite a bit of hassle that appears to be hassles everywhere i've looked.
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a b C Monitor
October 16, 2014 7:02:50 AM

I'm not 100% certain but looking up some dp-dvi adapters, some are powered, if that is significant at all i don't know. Is yours a single straight through adapter or is there a usb connection from it as well? You seem elegant enough to know the difference but in case, if there is usb, that needs to be connected.
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October 16, 2014 7:24:47 AM

boju said:
I'm not 100% certain but looking up some dp-dvi adapters, some are powered, if that is significant at all i don't know. Is yours a single straight through adapter or is there a usb connection from it as well? You seem elegant enough to know the difference but in case, if there is usb, that needs to be connected.


No USB or anything, it goes directly from my mini displayport in my laptop to the dvi dual link in the monitor
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a b C Monitor
October 16, 2014 7:30:19 AM

Hmm, might pay to check with Asus anyway. It may, i stress may that dp-out from the laptop for 120hz may need to be powered. If anything you find contradicts this than ignore but wouldn't hurt to ask i guess.
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October 16, 2014 7:34:27 AM

boju said:
Hmm, might pay to check with Asus anyway. It may, i stress may that dp-out from the laptop for 120hz may need to be powered. If anything you find contradicts this than ignore but wouldn't hurt to ask i guess.


So you would suggest that I ask asus if it's needs to be powered or not, to run 120hz on an external monitor?
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a b C Monitor
October 16, 2014 7:49:03 AM

Yea, we'll see where that gets you regarding powered or not asking them directly.

You payed money for a good monitor and everything on the internet seems in favor for your laptop to run it, maybe Asus will give a more definite answer to whats going on.

Someone might jump on here with more knowledge with this but until then Asus would be worth a try. Hope they don't take too long replying.
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a b C Monitor
October 16, 2014 7:56:00 AM

Last ditch effort, you could try using a mini-DP to DP cable. It's going to cost you without guarantee of success.
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October 16, 2014 8:14:56 AM

huilun02 said:
Last ditch effort, you could try using a mini-DP to DP cable. It's going to cost you without guarantee of success.


There is no DP entrance in the XL2411Z :/ 
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a b C Monitor
October 16, 2014 5:57:35 PM

Just on Active adapters again, im assuming the cable you're using came with the monitor and guessing under different circumstances with a desktop gpu that cable would have worked.

Just some followup ideas to go on, the possibility your laptop's DP can't provide enough bandwidth for 1080p @ 120hz.

http://forums.whirlpool.net.au/archive/2111630

Quote:


You need to be looking for a laptop with either a dual link DVI port (preferred, check for 166p support) or a Displayport output....

With the newer laptops these days you will find that dual link- DVI is getting less and less common but display port is replacing both HDMI/DVI

If you get a laptop with only displayport you will need to buy a active Displayport- dual link DVI converter

Good luck
Andrew Rox22
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a b C Monitor
October 16, 2014 6:32:27 PM

http://en.wikipedia.org/wiki/DisplayPort#Overview

Quote:
The DisplayPort signal is not compatible with DVI or HDMI. However, Dual-mode DisplayPorts are designed to transmit a single-link DVI or HDMI 1.2/1.4 protocol across the interface through the use of an external passive adapter that selects the desired signal and converts the electrical signaling from LVDS to TMDS. Analog VGA and dual-link DVI require powered active adapters to convert the protocol and signal levels and do not rely on Dual-Mode. VGA adapters are powered by the DisplayPort connector, while dual-link DVI adapters may rely on an external power source (see compatibility with HDMI, DVI and VGA).


Displayport - Mini Displayport differences; http://en.wikipedia.org/wiki/Mini_DisplayPort

Thought i'd research the differences between them because your laptop has the mini version. Wanted to clear things up for myself in case there were more differences besides cosmetics.
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October 16, 2014 6:37:51 PM

boju said:
http://en.wikipedia.org/wiki/DisplayPort#Overview

Quote:
The DisplayPort signal is not compatible with DVI or HDMI. However, Dual-mode DisplayPorts are designed to transmit a single-link DVI or HDMI 1.2/1.4 protocol across the interface through the use of an external passive adapter that selects the desired signal and converts the electrical signaling from LVDS to TMDS. Analog VGA and dual-link DVI require powered active adapters to convert the protocol and signal levels and do not rely on Dual-Mode. VGA adapters are powered by the DisplayPort connector, while dual-link DVI adapters may rely on an external power source (see compatibility with HDMI, DVI and VGA).


Displayport - Mini Displayport differences; http://en.wikipedia.org/wiki/Mini_DisplayPort

Thought i'd research the differences between them because your laptop has the mini version. Wanted to clear things up for myself in case there were more differences besides cosmetics.




so TLDR: I have to buy an active adapter?
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a b C Monitor
October 16, 2014 6:53:47 PM

It's looking so. I'd hate to have you spend money for nothing so maybe email support@BenQ.com

Your Monitor manual. It doesn't say much about Active adapters. Will look through your laptop manual soon to see if anything there is mentioned.
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a b C Monitor
October 16, 2014 7:20:21 PM

By GoodBytes

Quote:
If the monitor has DisplayPort, then yes.

But if the monitor does not, and you'll use a converter down to DVI, you'll only get single link DVI. Which means that you have at best 1920x1200 @ 60Hz.

You need an active powered DisplayPort to Dual Link DVI adapter. Those are costly, and I have no idea if the adapter support 120Hz+, as you have a circuit inside.
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a b C Monitor
October 16, 2014 7:23:03 PM

LOL nothing good is ever easy, if you do buy an adapter, they wont be that much, $70 or so, and ask to return it if doesn't work. Think it will though, everything is pointing to it being the case. Look at the back of the packaging or online for the adapters rated resolution and frequencies.
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October 17, 2014 4:52:25 AM

Will try to get hold of an active adapter, thanks for your help mate!
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October 17, 2014 4:59:30 AM

I'm not going to read all those thread comments lol. Anyway, what I think you need is a dual DVI to dual DVI port to make the 120 hz work.
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a b C Monitor
October 17, 2014 6:23:30 AM

ZeusGamer said:
I'm not going to read all those thread comments lol. Anyway, what I think you need is a dual DVI to dual DVI port to make the 120 hz work.


Yea probably is fine with dvi to dvi the trouble is his laptop doesn't have dvi; only vga, dp and hdmi.


Its tricky, either dvi to dvi or dp to dp, when converting from dp to dvi is what all the fuss was about up there lol.

We'll see, np jesp60812 all the best hope it works out, get back to us if it works or not.

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October 17, 2014 6:25:20 AM

boju said:
ZeusGamer said:
I'm not going to read all those thread comments lol. Anyway, what I think you need is a dual DVI to dual DVI port to make the 120 hz work.


Yea probably is fine with dvi to dvi the trouble is his laptop doesn't have dvi; only vga, dp and hdmi.


Its tricky, either dvi to dvi or dp to dp, when converting from dp to dvi is what all the fuss was about up there lol.

We'll see, np jesp60812 all the best hope it works out, get back to us if it works or not.



Ah I didn't see that he was connecting from a laptop.

To be honest, I don't think there's a way to make a laptop go to 144 hz.

But don't quote me on that lol. Hope you guys solve this problem.
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a b C Monitor
October 17, 2014 6:59:29 AM

no worries, be pretty lame for a 670m not able to do 120hz/144hz on an external monitor if that were the case. There are forums/threads with people doing so with laptops without problems. jesp can do 1080p @ 60hz with single link from dp to dvi but as mentioned in the links above, or so it seems, if he wants to go higher, the signal needs to be boosted by a power source like usb.

Anyhow this has been a learning experience for me as well.
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4 minutes ago

boju said:
no worries, be pretty lame for a 670m not able to do 120hz/144hz on an external monitor if that were the case. There are forums/threads with people doing so with laptops without problems. jesp can do 1080p @ 60hz with single link from dp to dvi but as mentioned in the links above, or so it seems, if he wants to go higher, the signal needs to be boosted by a power source like usb.

Anyhow this has been a learning experience for me as well.


I've been writing with a guy from ASUS support, and he confirmed that the GPU could very well do 120hz aswell as 144hz, and he also said that it sounded like there wasn't enough bandwith, and he would suggest that I would try another cable.

So I think I have to invest in an active Minidp-> DVI-D cabel, despite being exspensive.

I'll try to get hold of an active one and return to you guys if it worked or not ^^
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