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No 1080p option for 1920x1080 120Hz

post #1 of 13
Thread Starter 
I've got the Acer GD235HZ 120Hz 3D ready monitor. I've been using the 1920x1080 120hz 32-Bit native resolution assuming I've been playing my games in 1080p. When I open my Nvidia Control Panel, I notice their are other resolutions. Their's a list of HD resolutions, with 1080p offered at a resolution as high as 1920x1080 32-Bit, but the only hertz offered are 25, 29, 50, and 59Hz. Their's no option to select 1080p 1920x1080 32-Bit at 120Hz. Is their something I need to do in order to enable 1080p at 120Hz or is the native resolution setting already displaying in 1080p, even though it's not there in the list?

I read online that you need something called an active display port adapter. I have my monitor connected to my primary graphics card via the DVI-D cable which came with my monitor. Do I need to purchase an active display port adapter in order for the option of 1080p at 120Hz to become available in the Nvidia Control Panel?
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post #2 of 13
If I remember correctly to do 120hz at 1080 you would need to use two dvi cables, its not something I have ever looked into so someone with experience please chime in and correct me if im wrong.
post #3 of 13
You need a dual-link DVI cable. It needs to have all the pins in the cable. If it has some missing, you need a new one.
    
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post #4 of 13
Quote:
Originally Posted by john2earth View Post
I've got the Acer GD235HZ 120Hz 3D ready monitor. I've been using the 1920x1080 120hz 32-Bit native resolution assuming I've been playing my games in 1080p. When I open my Nvidia Control Panel, I notice their are other resolutions. Their's a list of HD resolutions, with 1080p offered at a resolution as high as 1920x1080 32-Bit, but the only hertz offered are 25, 29, 50, and 59Hz. Their's no option to select 1080p 1920x1080 32-Bit at 120Hz. Is their something I need to do in order to enable 1080p at 120Hz or is the native resolution setting already displaying in 1080p, even though it's not there in the list?

I read online that you need something called an active display port adapter. I have my monitor connected to my primary graphics card via the DVI-D cable which came with my monitor. Do I need to purchase an active display port adapter in order for the option of 1080p at 120Hz to become available in the Nvidia Control Panel?
You shouldn't require any adapter.

Just connect the dual link DVI cable (the one with all the pins in it) to the monitor, and to the DVI port on the GPU

Try both ports on the GPU, not sure on if both DVI ports on the nvidia GPUs are always dual link.

Other than that, I don't know. Try disabling EDID and enabling 120hz?
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post #5 of 13
Delete.
post #6 of 13
Thread Starter 
Quote:
Originally Posted by De-Zant View Post
You shouldn't require any adapter.

Just connect the dual link DVI cable (the one with all the pins in it) to the monitor, and to the DVI port on the GPU

Try both ports on the GPU, not sure on if both DVI ports on the nvidia GPUs are always dual link.

Other than that, I don't know. Try disabling EDID and enabling 120hz?
The cable I have currently connected is the DVI able that comes with the monitor. It's connected in the back of the monitor in the slot with "DVI-D IN" written above it, and it's connected to my top GPU's top slot (I have two GTX 570s). The manual shows the cable labeled as "DVI Cable (Only Dual-Input Model)". What does this mean? Is the native resolution already displaying at 1080p since it's at 120hz or is a different cable required to be purchased in order to display 1080p?
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post #7 of 13
If you DVI-D out of htese, it is correct. If it is, then aas I said, I have no idea other tha nmessing with EDID.

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post #8 of 13
Thread Starter 
I'll power off my PC and check to see which DVI ports my DVI cable and GTX 570s have.
Edited by john2earth - 10/15/11 at 7:57pm
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post #9 of 13
Thread Starter 
My two 570s have DVI-I (Dual Link) ports. The DVI cable that I have connected from my monitor to my top 570 has the DVI-D (Dual Link) pins.

Does this mean that having my resolution set to the native resolution of 1920 x 1080 at 120Hz (32-Bit) is 1080p by default, or should it be displayed among the list of other HD resolutions shown as 1080p?
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post #10 of 13
Quote:
Originally Posted by john2earth View Post
I'll power off my PC and check to see which DVI ports my DVI cable and GTX 570s have.
BTW: Monitor cables are hotswabbable, you don't need to shut your PC down to be able to safely unplug and plug them. You can just do it while the computer is on.

Same goes for the monitor.

Quote:
Originally Posted by john2earth View Post
My two 570s have DVI-I (Dual Link) ports. The DVI cable that I have connected from my monitor to my top 570 has the DVI-D (Dual Link) pins.

Does this mean that having my resolution set to the native resolution of 1920 x 1080 at 120Hz (32-Bit) is 1080p by default, or should it be displayed among the list of other HD resolutions shown as 1080p?
It should technically be there.

If not, disable EDID from nvidia control panel and then apply 120hz.

After that, I have no idea, and you'll have to wait and see if anyone who knows more chimes in.
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