No 4K resolution on Intel HD530 on Mojave 10.14.6

I'm currently running an opencore (0.5.9) vanilla install of Mojave. I recently upgraded to a 4k monitor, but the highest resolution available is 2560x1440. I have the latest version of Lilu and Whatevergreen installed. I have tried switch res, the core display patch, RDM, etc.... but no luck.

• CPU: i5-6500
• SMBIOS: iMac 17,1
• Motherboard: ASUS H110T CSM
• Monitor: LG 32un500-w

I also have the pre-allocated DVMT set to 64 mb in the bios.

I'm running out of ideas.

I have included pics of the device properties in propertree.

​

https://preview.redd.it/sq6tl3esj7b61.png?width=633&format=png&auto=webp&s=c2534c5aa39415b6902e52caf2976cff96e2fa2f

https://preview.redd.it/93uo3tu1k7b61.png?width=665&format=png&auto=webp&s=ed9dad71ca81ec20f9da3c7f3d42bec75a90f9aa