17 R3 4k screen - 2560 x 1440 not an available resolution

I'm not sure I'm going to flash the newest BIOS as I have read about plenty of people having issues with the newest one out there.   Someone on another site even stated that one of the newer BIOS is the culprit of this problem, but obviously I don't know if that's 100% true or not.

I'm using the most updated Intel driver from the Dell support page currently, same with the Nvidia driver.  So the only thing in your recommendation that would change for me is updating the BIOS and like I said, I'm a bit hesitant to do that considering how many people I've seen having problems with it. 

If I see some information to the contrary here though, perhaps I'll try it.  Are there any posters here who can confirm that they have 2560 x 1440 as an available resolution on the 4k model, using the latest BIOS/drivers?

Edit: For the record I decided to update to the most recent BIOS, same problem.

Can you please clarify as to why it wouldn't be an option?  I mean I understand that 2560 x 1440 is called "QuadHD" and 4k is called "Ultra HD," but those names don't really make any kind of difference.

I mean in my Windows control setting where I can change the resolution, I have all of these resolutions available to me (and more, I just stopped at 1280 x 960,) so why isn't 2560 x 1440 also in that list? 
If resolutions like 2560 x 2048, 2560 x 1920, 2560 x 1600, and other 16:9 resolutions like 1680 x 1050 & 1366 x 768 are there, I don't get why 2560 x 1440 isn't too. 

I'm not sure I'm going to flash the newest BIOS as I have read about plenty of people having issues with the newest one out there.   Someone on another site even stated that one of the newer BIOS is the culprit of this problem, but obviously I don't know if that's 100% true or not.

But you do know that isn't true, if your older BIOS shows the problem, it isn't something caused by the newest one :-)

Here's my list, latest drivers (NOT from Dell), latest BIOS; no 2560 x 1440, which while I really don't care about it, is still really strange, it should be there - especially on hardware with a built in 16:9 display.

I didn't say they cause THIS problem, I said I've just heard other people having issues with the new BIOS.  Issues beyond this one.

Anyway yes like you said, 2560 x 1440 should be an option.   There is some kind of issue there that should be acknowledged/fixed. 

Did you ever figure this out? I am trying to game at 1440p and have no clue how to do it. Currently I just have my display at 4k and let the game scale to 67%