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Resolution keeps opening in 1280x720 instead of 1920x1080

315 Views 3 Replies 4 Participants Last post by  KhunDoug
Hi folks, this is my first post on this site which I hope is okay. I'm hopeful someone can help as I am not able to figure out why this issue is happening.

Yesterday I started getting a very odd issue with my monitor. Whenever I booted up my PC, the resolution kept going into 1280x720 instead of the original 1920x1080. When the resolution goes into 1280x720, I can only select 60hz in the Refresh Rate drop down. There is no other option here (usually I can see 100hz / 120hz and 144hz options). Here is a screenshot of my Display Settings:

When I managed to get the resolution back into 1920x1080, the Refresh Rate in Windows displayed only 100hz and no other option:

The only way I was able to get the monitor to detect 1920x1080 was by plugging the Display Port cable into different ports on the back of my graphics card and restarting my PC, and eventually I was able to select 144hz. Once I restart my PC, it goes straight back to 1280x720 resolution.

My monitor is a BenQ XL2720Z that supports 144hz. I have been running my monitor at 144hz since I got it. I have tried the following but I am not able to get the Refresh Rate settings to consistently show 144hz:
  • Changed Display Port cable to a brand new cable
  • Updated to the latest Nvidia driver and rolled back (I am currently using a driver from February 2021 - driver no. 465.89)
  • Unplugged all other monitors
The other specs of my PC are below:
  • Tech Support Guy System Info Utility version
  • OS Version: Microsoft Windows 10 Home, 64 bit, Build 19042, Installed 20210312121243.000000+000
  • Processor: Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz, Intel64 Family 6 Model 94 Stepping 3, CPU Count: 4
  • Total Physical RAM: 16 GB
  • Graphics Card: NVIDIA GeForce GTX 1070
  • Hard Drives: C: 464 GB (362 GB Free); E: 223 GB (43 GB Free);
  • Motherboard: ASUSTeK COMPUTER INC. Z170-A, ver Rev 1.xx, s/n 160777118906516
  • System: American Megatrends Inc., ver ALASKA - 1072009, s/n System Serial Number
  • Antivirus: Avast Antivirus, Enabled and Updated
If anyone could help me I would really appreciate it. Thanks a lot.
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Have you made use of your monitor's on-line user manual?

Have you installed your monitor's Windows 10 driver?

Note: The driver is in ZIP format, so you need to extract its contents first and then install it via the Device Manager.

Does it appear to be working all OK apart from the resolution?

Graphics quality OK?
Good frame rates etc?
I've seen a very similar issue to what you describe. And, like you, I really have no idea why the display settings got changed as I know I did not alter them. It was really frustrating when gaming and I couldn't get the resolution and refresh rate I wanted. See if this helps you. Go to Settings / Display, and scroll down to Advanced display settings. From there, click the link for Display adapter properties for Display 1. That will open a new window and at the bottom click List All Modes. Notice how this window is similar to the old Control Panel stuff from days past! You should be able to select the proper resolution and refresh rate from there. You can also click the Monitor tab and adjust the Screen refresh rate setting if necessary.

There is one other possibility that could be causing your problem, but your description is different that what I experienced. Again, for some unknown reason, whenever the display would go to power save mode, and then refresh once I was back at the keyboard, the screen resolution would default to something other than what I was originally using. The real downside to this was that my desktop icons kept getting rearranged. The answer there was obscure and took some poking around the registry and either changing or deleting keys. I don't believe what you are experiencing is that, so I will defer that obscure key hunt for another thread.
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