Power BI high CPU and RAM load

Hello,

Recently we've started working with Power BI. We are running it on HP EliteBook 840 G5's. It was running fine until recently. It doesn't seem to have enough power. CPU goes all the way up, also 16GB of RAM gets filled pretty quickly. Problem is, there's not enough information about what kind of system I should be looking for. Should I be looking for a simple loptop or a desktop workstation? Or server grade equipment is required?