[NAME]  Yes, HDMI 1.4 is your issue.  It supports 2560x1440 60 Hz or 4K 30 Hz.  If you want to use the system's USB-C port, I'd recommend USB-C to DisplayPort if your display has an available DP input, for the simple reason that USB-C uses DisplayPort natively for video anyway, so it's a simpler device.  By comparison, USB-C to HDMI adapters/cables incorporate an active signal converter chip to switch that DP signal over to HDMI, and that can cause interoperability issues.  I've helped at least five people on this forum who had a USB-C to HDMI adapter that worked on one laptop but not another, and in all cases, the fix was to simply try another brand of adapter.  Of course that shouldn't have been necessary and there was no way to know beforehand which brand would work and which wouldn't since they both should have, but it's also true that not everything that SHOULD work in tech always does, so I try to keep things as simple as possible.  But if that isn't an option, yes a USB-C to HDMI 2.0 cable/adapter should work, because the Latitude 5510's USB-C port supports DisplayPort 1.2, which has enough bandwidth for 4K 60 Hz, and HDMI 2.0 does as well.
Hello, Just got a work laptop in, its a Dell Latitude 5510. I already had a 3440x1440 monitor so I tried plugging it in. It took some doing to get it to display at 3440x1440, had to create a custom resolution in the intel graphics command center. However, I noticed that it feels sluggish and I think the reason for that is that the refresh rate is capped at 30hz. Is there something that I can do about this?   EDIT: Seems like the problem is the HDMI 1.4 port. Would getting a USB C to HDMI 2.0 adapter fix this?
Can't get 3440x1440 above 30 fps on Dell Latitude 5510