The Core i5 could drive three GPUs so it's rarely an issue of the CPU on this. I don't know what this workload is but does the laptop have a dedicated GPU? If not, try a laptop with the Nvidia 1050 or better.
And what is this workload?
I recently bought two Acer monitors for my laptop and found I need a lot more processing power to handle the workload. So, I definitely need a new computer with a bigger processor. So, how big of a processor does a laptop have to have to not be slowed down and lag? Any laptop recommendations? Or has to be a desktop? Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic