Can't select 2560x1440 resolution on new QHD monitor

I have just added an AOC Q27B3MA QHD monitor to my Windows 10 system (which has 2 other displays), and would like to use it in 2560x1440 mode. Windows (22H2 Build 19045.3803) does not allow me to select this resolution - the maximum it offers in the dropdown list is 1080p (1920x1080).

I have a ZOTAC GeForce GTX 1660 SUPER 6GB Twin Fan Graphics Card, which does support 2560x1440.

Could anyone advise on how I can make use of the full resolution?

EDIT: I have now managed to use the Nvidia Control Panel to create and apply a Custom Resolution: 2560x1440 @60Hz. I have now selected this, but the overall image quality is blurry compared to the other displays. Any idea how I might fix this?

I see this card has the following specs:
3 x Displayport 1.4 (up to 7680 x 4320 A 60Hz)
1 x HDMI 2.0B (up to 3840 x 2160 at 60Hz).

Remember this is maximum so resolution is shared among the displays. You said you have three displays. What resolutions and refresh rates are your thee monitors? If you want a better experience I suggest you only use two displays.

Of course if you insist on using three displays then your only options may be to get a much better graphics card.

itm said:

The other two displays are 1920x1080 (one is a HD TV, the other a monitor)

Do they all have a 60Hz refresh rate? If not then try then all at 60Hz.

Another thing to try is all three displays with 1920x1080 @60Hz.

How good of a HD TV do you have? The average TV is not meant to be hooked to a computer and might give marginal results.

How good does it look having just the two monitors hooked up? Like I said having three display hooked up at one time is too much to ask for. Like I said you might have to settle for only two. Which two are you choice.

BTW, I have seen where some people do have three monitors set up with no problems. Of course these people have high end computers and graphic cards. That makes the difference.