Many people report that they can get that card running on lesser power supplies, but I won't recommend it and I'm not finding an easy power supply upgrade for you. For a GT1030, they recommend at least a 300 watt power supply. There are cards that physically fit and would meet the minimum requirements, the manufacturers recommend a larger (more wattage output) power supply for these cards. According to Intel HD Graphics 4600 on this CPU : Intel® Core i7-4790 Processor (8M Cache, up to 4.00 GHz) Product Specifications 4K monitors at 60Hz should be supported by the igpu. Apple Mac Pro MSI GTX 770 2GB Graphic Card,AppleBoot Metal Mojave,Catalina.

In order for you to be able to use the latest version of Lightroom, you would need to install something like a Geforce GT1030 graphics card. Between the low-profile, single slot width form factor and the 220 watt power supply, you're really pushing the limits. This also depends on the DisplayPort output needed to carry the signal. It is worth mentioning that the higher the resolution, the lower the refresh rate will be due to bandwidth. Unfortunately, your current computer really is a limiting factor. Based on the information provided, Intel® HD Graphics 4600 does not support 5120x2160 at 60Hz. Intel HD Graphics P4000, Intel (R) HD Graphics P4600/P4700, Intel adobe. Your current graphics solution (Intel HD4600) does not meed the minimum specifications for Lightroom. Re: Graphic card for all adobe apps - Adobe Support Community Is GPU or CPU.

Intel hd graphics card 4600 lightroom