Got a new motherboard and suddenly can't use 120hz

Nebell

Nebell

2[H]4U
Joined
Jul 20, 2015
Messages
2,382
I have a Samsung Q7F tv which supports 1440p/120hz.

My old motherboard broke (Asus Strix z370-g) and I bought a new one (MSI MPG z390-something).
1440p/120hz worked flawlessly before, but now I can run only 1080p/120hz, 1440p/30hz, 2160p/60hz.

I have not changed my video card or it's HDMI port (it's an MSI 1080Ti). First I thought this is a problem because I did not do a clean Windows 10 install after changing the motherboard. But once I did it I still have the same problem.
I tried to customize 1440p/120hz and it works, but everything is very blurry.

What's going on here?
 
Nebell said:
I have a Samsung Q7F tv which supports 1440p/120hz.

My old motherboard broke (Asus Strix z370-g) and I bought a new one (MSI MPG z390-something).
1440p/120hz worked flawlessly before, but now I can run only 1080p/120hz, 1440p/30hz, 2160p/60hz.

I have not changed my video card or it's HDMI port (it's an MSI 1080Ti). First I thought this is a problem because I did not do a clean Windows 10 install after changing the motherboard. But once I did it I still have the same problem.
I tried to customize 1440p/120hz and it works, but everything is very blurry.

What's going on here?
Click to expand...
ddu and reinstall newest drivers
 
Long shot,

How are the PCI-E slots configured in the bios?

3 x PCIe 3.0 x16 slots (support x16/x0/x4, x8/x8/x4 modes)

Maybe confirm that the slot you've got your 1080ti in is actually running at x16 speed.
 
ocbaud said:
Long shot,

How are the PCI-E slots configured in the bios?

3 x PCIe 3.0 x16 slots (support x16/x0/x4, x8/x8/x4 modes)

Maybe confirm that the slot you've got your 1080ti in is actually running at x16 speed.
Click to expand...

I'll check it out when I get home :)

It has to be something crazy. This started happening after PCIe on my old motherboard broke. I bought a new one (not the same manufacturer) while I'm waiting on warranty replacement on the old mobo.
I'm not sure if this somehow affected the video card. But I don't think so. I can't see anything wrong with it. Text on 4k/60hz is clear as a diamond, it's just 1440p/120hz. I tried different HDMI cables and different ports and made sure my TV connection is set to PC.
 
I have the nu8000 which is very similar tv and i have documented my problems with enabling 120hz. Turn on the freesync feature of the tv and your computer will see it as a device that suporfs 120hz, from there onnout even if you turn the feature off the tv will let you do 1440p 120hz
 
This has pretty much got to be a driver issue.

ocbaud said:
Long shot,

How are the PCI-E slots configured in the bios?

3 x PCIe 3.0 x16 slots (support x16/x0/x4, x8/x8/x4 modes)

Maybe confirm that the slot you've got your 1080ti in is actually running at x16 speed.
Click to expand...

That shouldn't make any difference.
 
Im telling my post above will fix it, ive have two nu8000s and both opened up anything above 1080p 120 hz once i turned on the free sync capability, originally i turned it on for my xbox one x, and realised my gtx 1080 had 1440 120hz available all of a sudden, and the next time i was fooling around with my radeon vii and then my 2080 ti had it available.
 
Willseyvilleny said:
Im telling my post above will fix it, ive have two nu8000s and both opened up anything above 1080p 120 hz once i turned on the free sync capability, originally i turned it on for my xbox one x, and realised my gtx 1080 had 1440 120hz available all of a sudden, and the next time i was fooling around with my radeon vii and then my 2080 ti had it available.
Click to expand...

Lol, you're awesome. It fixed the problem :D
I was ready to give up since I have Asus ROG Strix XG438Q incoming and was either gonna sell this TV or use it for visitors to see what the person using VR is seeing, but now I'm probably not gonna sell it.
 
Last edited:
You must log in or register to reply here.
Back
Top